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

I recently realized that while I have several lp's I don't have any cd's by Tull. Really like the early stuff. The difference between some originals and remastered material has also been a recent revelation to me and not looking to waste any $$ on cd's I'll not play more than once what and where would you look? What about the quality of the dvd concerts?