I ordered my DPMS G2 Recon for $1400 and only waited 2 weeks for it. The barrel is a very high quality SS match grade piece according to DPMS - the head spacing, feed ramps, and bolt lugs are fairly "tight" as far as semi-autos go. It shoots very, very tight groups for a semi - with good technique its a sub - or par MOA gun. At 6x I can reach out with confidence at 500 yards with a 180 grain TTSX, 41 grains of AR Comp, and Lapua brass and drop a big hog in two steps. At 1x, with both eyes open Binden Aiming Concept CQC style at 10 yards I can dump a 20 round mag as fast as I can pull the trigger into a row of full soda cans. So, this can be great fun.
In terms of recoil - it's less than I originally thought... It doesn't "recoil" but instead pushes against you like a 45ACP and no muzzle " flip" , just a slight manageable muzzle move about an inch towards 2 o'clock. If you have an athletic stance and keep your right elbow tucked against your side and supporting most of the gun weight go ahead and pull the trigger as fast as you can at CQB distances. Way cool.
The receiver length is about halfway between a .223 AR and the Gen 1 large frame .308. It's very compact in there - you have to remove the safety assembly in order to change the trigger group. I've noticed a lot of galling on the charging handle so I keep it greased, and the lack of a proper aftermarket charging handle means your only alternative is a Badger Ordnance latch - barely adequate with gloves and a scope.
In terms of building a Gen 2 from scratch ( provided DPMS would sell you the receiver and BCG which I doubt ) - I've looked at the economics and IMHO you would be better served buying the Gen2 model nearest to your end game fantasy and modding it as your pace and economics permit.
I'm personally not sure that a Krieger barrel and a Nightforce BEAST scope gets me much.
Personally, I built mine out to be a 3-gun style rifle rfle with balls. Humane one-step killing power at 500 yards and 10 yard CQB capability. It's not the perfect compromise but I love it.