Get an Aero Precision upper and lower. Tons of barrels to choose from, Ballistic Advantage, Kreiger, Rainier Arms. Put a Magpul PRS stock and a timney trigger. Get a hand guard you like and you’ll have a $1000 gun that’s worth $2500.
There not that bad to build. You learn a lot more about how it works if you build. Only problem with building is that it can be addicting and you’ll want to build more.