I went with the 2CD/2DVD set because, even if it looks great in HD on the BDs, I will probably only watch the concert a couple of times, whereas I'll probably listen to the album many times on CD. And having the CDs makes it easier to make copies and have the lossless files ripped to my harddrive (rather than hunting them down online...somewhere).
If the BD ever goes on sale, I may pick it up. Radiant tends to have sales every other month or so, so if it gets cheap, I'll snag it then.
-Marc.