Wilson and Les Baer definately make real nice guns. The can keep up with the best of them.
Personally, I would never buy one of theirs as long as Bushmaster is around. B.M.'s best guns are every bit as good, they just lack that designer label. The Wilson and Baer guns come with some cool stuff, like match triggers and the like.
I like to hand pick my upgrades, and so having the "luxury" of someone else planning my rifle for me is no luxury at all. At least for me.
Not that a Bushmaster requires any upgrades in the first place, but there's always a new toy just waiting for you to try on your rifle. Why not just get an extremely well built Bushmaster, which drives tacks right out of the box? Then YOU can decide on whether a $175.00 match trigger is needed or not. You can also afford to get some cool accessories with the cash you save.
You may not think so now, but trust me, down the road, when you see how incredibly easy it is to re-fit your rifle with the stuff you actually need, you'll be glad you hadn't spent all that money to let Les Baer and Wilson make those decisions for you.
P.S.- If spending oodles of money for an out-of-the-box masterpiece is your plan, I'd throw Knights Armament on the top of your list. Otherwise, look forward to easily customizing your Bushmaster in to THE rifle of your dreams.