The Magpul PRS is an excellent stock, but it is HEAVY, and not suited for a gun that may be shot while on the move/standing.
Stocks to consider:
Magpul UBR
Vltor Rifle Modstock (available in A1 and A2 lengths)
or a standard A1 or A2 stock.
For collapsible models, there is the Magpul MOE, CTR, and ACS; and the Vltor IMod and EMod.
In the collapsible department, I've tried the MOE and ACS, I found the ACS excellent but a little too heavy. I'm currently using the IMod, and I love it. It offers the cheekweld of the ACS, but the weight of the MOE or CTR. It's the ideal combo for me.
In fixed stocks, I have a PRS, and while it will stay on my bench gun, future guns will get the Vltor A5 Modstock system. It really is the future for AR buffer/receiver/stock systems.