Agreed, if money was not an issue... forget building it...I'd probably just get an OBR :Ptexanron wrote:If money is not an obstacle I'd vote for LaRue.
But touching on the OP's question, I would take "dependable" and "fun" as meaning something you wouldn't hesitate to bring into a fight, and is not a safe queen (how is something you never use fun?)
So without going into great detail because we can discuss brands and options until the cows come home, I would build it to these specs (since I think most lowers/uppers are the same, just different flavors/rollmarks/price/manufacturing process...as long as it goes bang and a bullet exits the chamber at whatever I am targeting, a decent brand at least)
2-stage trigger
Magpul UBR stock
MOE or MIAD grip (not into fancy grips but these are a step above basic M4 pistol grips with the finger groove)
14.5" midlength with pin and welded flash hider and A2 FSP (midlength gas system for a longer sight radius)
Quad rails with detachable sling mounting point
Failzero nickel-boron BCG
BCM Gunfighter Mod4 Medium charging handle
RRA dominator2 eotech mount
Eotech sight (take your pick, personally I'd get one that runs on AA batteries for scavenging situations :P)
VTAC padded sling