Jethro Tull...any cd's to stay away from?

The only ones I don't really care for are Too Old to Rock"n"Roll Too Young To Die, and perhaps Under Wraps even though there are a few good songs on it. Some of the later ones I find really good are Crest of A Knave, J-Tull Dot Com, The Christmas album etc.

Most of the early Jethro Tull albums were masterpieces (IMHO), including THIS WAS, BENEFIT, AQUALUNG, THICK AS A BRICK, LIVING IN THE PAST, TOO OLD TO ROCK AND ROLL-TOO YOUNG TO DIE. You will realize this after the first 100
listenings. I can't recall a bad CD. Save youself some expense and try one of the many greatest hits/compilation
albums.

Among the earlier Tull Remastered CDs, IMHO SOUND-WISE only:
Stand Up is great; Benefit not so good, LPs are better; Aqualung never has sounded good in any format I've ever heard, Thick as a Brick is quite good, Passion Play is much better than the original LP; Minstrel is quite good, War Child is OK, SFT Wood is good, Heavy Horses is very good. The rest are pretty much all good from there, with Broadsword and the Beast a standout sonically (but perhaps not musically).
Personally I think Heavy Horses is an absolute Tull masterpiece.
Haven't seen any of the concert DVDs, although the "A" CD/DVD set is worth having if only for the live versions of Black Sunday and Aqualung, which just flat out rocks!
Enjoy!

Aqualung was a bad recording from the beginning. Even Ian Anderson has mentioned how bad it sounds due to the recording venue.