Well.
YYYY.MM.DD (the dates are straight off my memory, I'll put a (*) where I'm not entirely sure of the day)
1992.06.08 - DT opens for Iron Maiden, spectacular performance by James LaBrie
1992.10.04 - One of the first shows of the IAW tour, showcases JLB's live voice before health and fatigue issues came into being within a few weeks.
1993.03.04 - Official bootleg, first performance of Eve, To Live Forever with James, ACOS with vocals, first ever two-act show
1994.09.sth - The Rudess Experiment bootleg, a one off show with Jordan Rudess on the keys before the band decided to hire Derek Sherinian after JR turned down the offer to join the band full time.
1995.01.24 - Almost official, surely officially video broadcasted. Typical show of the Awake tour, James struggles more than a bit because of the recent injury
1995.01.31 - Legendary Ronnie Scott Club gig, a paradise for those who love the cover-heavy side of DT. A very fine bootleg, sound is perfect but there is hardly one DT song there!
1995.06.09(*) - First performance of ACOS post renewal. James sings the original "mercy fuck" line.
1995.10.28 - Official Bootleg, one of the three Japan shows that made up the entirety of the ACOS tour. Strong performance all around, great setlist and covers.
1997.04.14(or15, both are equally valid) - Amsterdam shows, Small Club Adventure! Crisp sound, great vocal performance, many songs from Falling Into Infinity are played in their original form (the album was still to be recorded!)
1998.06.22 - First semi-unplugged gig, this one was the famous Rotterdam show for the International Fan Club members. Lots of unusual songs making the setlist, very intimate vibe and perfect sound. A must have!
1998.06.25 - The Lost Paris Tapes, what was played at Le Bataclan the day Once In A Livetime was recorded, but didn't make the final cut on the CD!
1998.12.29 - (Heading For PlanetX) The second to last show with Derek In The Band, another semi unplugged show but with an extended setlist. Some very rare songs are played, some of which are not easily available elsewhere
2000.02.04(*) - The show that was interrupted by the fire officier during The Spirit Carries On. A very famous incident almost every fan knows all about!
2000.10.20(*) - Glasgow, very weird stuff happens, the band appeared to be on a jolly mood. I believe that's the Canadian Rap day.
2002.03.28 - One of the longest shows in DT history, two full sets plus an encore plus the entire Master Of Puppets album covered. All in New York City
2002.06.sth - Bucharest, Official Bootleg. Because honestly you can't not have it.
2002.11.03 - Rotterdam. A fairly standard (great) late SDOIT era show, with Children Of The Damned thrown in during the encore. It's probably the best sounding DT bootleg of all time, it rivals offiicial releases.
2004.04.02 - A great show from Philadelphia, with Pink Floyd's Echoes covered! Also, the full A Mind Beside Itself suite is there!
2004.04.03 - Arguably the best DT show of all time. Lenghty Drum and Keyboard solos, longer than usual instrumental jams, good vocals, guest cello player, Pull Me Under, the only other performance of Disappear. At the Theater At the Madison Square Garden
2004.09.21 - Last show of the tour in Monterrey, Soundboard quality, if you dig deep enough you might find an excellent multicam DVD of this. Great performance with a prog-heavy setlist in the tour where DT suppored Yes.
2005.10.29 - What is probably the strongest performance of the Octavarium Tour. A nice 2DVD 2CAM mix of this exists, James probably tops Score
2007.06.sth - One of the shows where the entire IAW is performed. A good one is the one played in Clermont-Ferrand
2008.01.30(*) - A rare evening with show played in Australia to homage the Aussie fans who had never been able to see the band perform in their hometurf before
2010.07.10 - Great one off DT-only show in the middle of the Final Frontier tour supporting Iron Maiden. One of the best shows and probably the best setlist of the BCSL era
2011.07.04 - First show in the Mike Mangini era. The sound is not the best ever, but the occasion is historic!
2011.10.02 - Chicago, a great DVD of a standard US leg performance.
2012.02.21 - Milano, strong performance, strong crowd partecipation, the band dedicated TSCO to a fan who had died a few weeks earlier in the Concordia shipwreck.
2012.07.16 - The best sounding recording of the ADTOE tour, and probably one of the best performances of the tour itself. Another must have!