I'm getting ready to order two barrels, but man there are just too many good options out there.

The first barrel I'm looking for needs to be a 28" 284 Winchester Standard Shank. I'm trying to stay under $400 shipped for this one. I'm down to getting either a Criterion or McGowen. Criterion seems to have a good following now, but only offers a 9 twist. McGowen could do either a 8 or 9 twist, but the 8 would take a little longer. Is there any other ones I should be considering for this?

The second barrel I'm looking for will be a 23" 6x45 and under $375 shipped. I'd like a contour heavier than a heavy sporter, but less than a varmint. I'm down to either a Blackhole Weaponry or an Xcaliber. The biggest difference between the two being the polygonal rifling versus standard. I've never had a polygonal, but the reviews see to be pretty positive.

I guess I should just be thankful there's so many options out there.