I have some bowflex adjustable dumbbells that go from 5-52.5 lbs. They're awesome, and can replace an entire weight tree. Now i just have to convince my wife to let me get rid of our dumbbell weight tree
I'm so glad I invested in the 10-90s way back when. 52.5 isn't enough for lot of my lifts - bench press, shrugs, rows. Heck, I'm even getting close to that limit for OHP. My only two beefs with them are how bulky they are, and you can't drop them. I accidentally put one down on an angle while doing a lying pullover, and cracked the end 'plate' off the bar. Fortunately, that plate is only 2.5lbs, and I was able to slip it back into alignment, and Gorilla Glue it back in place.
Otherwise, no way I'd have the space or $$$ for a full set of DBs 10 thru 90. I looked at Bowflex's website, and they're a grand/pair!! Saw one on Amazon for $1,500 for ONE!