Nice stippling, Schecter!
I really like the idea of the APEX FSS for a Steel Challenge or Bullseye-type of pistol, but personally not at all for IPSC or 3-Gun. It reduces the pre-travel which is part of the safety system for the M&P. But I have seen that sort of thing for Standard or Open IPSC pistols.
Triggers are a very personal thing. APEX has many options, so make sure you decide exactly what you want your trigger to do before shelling out for the particular parts. I use a DIY-modded factory sear and striker block, APEX polymer trigger, and factory trigger return spring. It's exactly how I like it: Compared to the factory trigger, it's lighter (around 5.5lbs), very smooth, clean break, pretravel is slightly reduced, and overtravel is almost eliminated.