I've tried most of the usual suspects (MDT, Manners, KRG, MPA, Foundation), but before I say anything, what works for me may not be what works for you.
In general, I dislike the recoil feel of the all-aluminum chassis I've tried (and it's been a bunch of them). I'm even one of the few who didn't dig the MDT ACC Elite I had (and IMHO that's the only aluminum chassis I'd choose). I haven't tried the Vanquish, but as far as the others, the MPAs aren't for me. I'd like to try a Foundation Samson that's not set up to be ~30lbs at some point... The Foundations ooze quality and have a great recoil feel, and even though I'm not a huge fan of the "grandpa's rifle" look or the way really wide forends settle and ride on bags, I might end up running one at some point.
My 2 favorite chassis that I've run are: KRG Bravo and Manners TCS.
A stripped $350 Bravo isn't too exciting (though it's a great lightweight/hunting rig), but a ~$700 Bravo decked out with a bunch of KRG weights and stuff is as good as just about anything else and better than most (and
not just "for the money"). A kitted-out Bravo is legit performance-wise, it just won't ever feel "premium" compared to most other more expensive rides. Worth noting: the Bravo's "cheap" polymer dampens the vibes more than one would think, a ~22-23lb Bravo is a smooth-shooting PRS rig (and feels better than any of the all-aluminum chassis I've shot).
A Manners TCS is super high quality and feels almost as dead as a Foundation, but it has a just about perfect (IMO) forend width for riding a Gamechanger. A TCS with a stout barrel and all the weights they sell will
only get to ~23lbs (which is good for me, YMMV), or, one can pull off the rail and weights, swap an SS for a CF barrel, and then it can be a respectable hunting rig...but that's only if you wear XL/L gloves, otherwise the grip to trigger reach is too much for most.
Chassis/Stock selection is probably even more personal than reticle choice. My best advice is to try as many as you can, ignore bells and whistles, and look for features that you'll appreciate over the long haul.
Bravo:
ACC Elite:
TCS:
