^ This is pretty obvious coming from me, but you really can't go wrong with any of the BOC's output.
As for me-
The Pineapple Thief - Someone Here Is Missing (2010)
Although quite Radiohead-esque in places (in a good way), Steve Wilson's production coupled with some rather punchy songwriting makes this one of 2010's more exhilarating releases for me so far, and is without a doubt the most interesting/distinctive release in this oft-ignored group's discography.
Jethro Tull - Crest of a Knave (1987)
Being the album that bested both Metallica and Jane's Addiction at the Grammys back in '89 in the Hard Rock/Metal category, one can't help but be curious, which led to me buying it yesterday during a bookstore browsing session. Rest assured though, I am still baffled even after a couple of spins: this is fantastic stuff and rather underrated in the Tull's discography, but Best Hard Rock Performance? Strange!