If you're not in a rush, watch the forums here; every now and again you'll find someone gets a bulk deal or surplus military stuff or whatever.
When someone posted it here, I got in on 4WPW's mis-price a coupla years back, paid $19 for the Procomp 30' x 3"'s, IIRC.
Also depends on what you mean by "good"; if you're after price point, you can watch Ebay for deals, for instance, or if you're after super quality, there are specialized vendors posted here that hjave the really good stuff (but it can cost more.)
Whatever you do, you know to only get straps that have the loops on the end, right, and not any kind of hook or metal whatever on the ends? :d We just had a thread about that =))
For snatching, I'd go as big as you can, like at least 3" wide, and as stupidly high capacity as you can get. A 6000# truck buried to its axles in mud has a MUCH higher effective weight, and with a rolling start your 6000# truck can exert a hell of a lot of force... so you want the strap to take it.
Snatching also involves some give in the strap, as opposed to chain, which doesn't have so much give to it

that should be a start. I'm tempted to post a link to Billavista's recovery bible as he talks about the weight multiplication thing and I think had some example tables of how much force is required to pull out trucks stuck up various inclines, and stuck so many inches deep, etc. :O
-- A