The OP did say he was open to just about any suggestion.
It was asked "What's this new gun going to do?" and that remains to be answered. It's the most important question of all. That determines what caliber - because a range gun using a lot of ammo isn't a hunting gun that fires less than 100 a year. It goes to What range (distances,) What targets? If the target is paper 95% of the time that makes a huge difference.
If it looks confusing out there, get specific about what the gun should do, and then specify all the rest to support that. Caliber, barrel, type upper to mount an optic, furniture, free float, then trigger, in that order.
I built an AR to hunt, so: 6.8SPC, best performance for the AR under 400m. 16" barrel, already longer than the 14.5" it was designed for, mid length gas, an A3 upper with rail to mount optics, an A1 stock for the right length of pull, less expensive than an adjustable, which most leave on one setting anyway, a TD grip, about the right size, rifle length handguards to cover a cold or hot barrel in the field - and because a good barrel is more accurate and cheaper than a quad rail, which can only protect it, not improve it. Iron sight FSB, because stupid things happen to glass optics, and strangely enough, they don't use shatterproof glass. I finished it with a Black River Tactical brake that throws all the noise forward. The trigger - GI lower parts kit, with an adjustable overtravel screw. It has a short pull, and almost no grit, because it doesn't drag over all that extra travel.
I saved about $500 not buying a useless quad rail for a hunting gun, or a high dollar super light target trigger on a field gun that will get dropped, banged around, hoisted into trees, etc. Hunting is a 2MOA proposition, about a 10" circle at 500m, which is an uncommon long shot hunting whitetail in edge woodlands.
What's the gun going to do, pick the best caliber, the best barrel length for that range, and walk thru it. The gun will be the most optimum you can get for the job - and the money, not something chosen out of a warm fuzzy feeling totally unsuited for what's needed.
Gunbroker is full of those.