Slate has a nice article on veg*n turkey options, covering the venerable Tofurkey and a few more recent products.
The Whole Foods one sounds quite good, and I'm tempted to pick one up to compare with the Tofurkey we always do. (My main gripe about Tofurkey is that it's a bit rubbery and dense).
Quorn is perhaps the most realistic (I like the way the reviewer complains that it's too realistic - bland and dry like real turkey!). I've had Quorn "chicken" before and to me it tastes just like the real thing (I used to eact chicken until 6-7 years ago).
Oh, and it's great to see Seattle-based Field Roast in the list too!