I used to only do CQB. a BFG is more beneficently, IMO. but then again, suppose it's personal. and no, best pistol is not necessarily what you think looks cool. Mag captacity, gas capacity, weight, feel, quality, aftermarket parts, spares, price, reliability etc. etc. My priority is reliability and funfactor when it comes to sidearm.
and if you dont have "Mags, gear or a better AEG or maybe a 2nd AEG", then yes. but the fact is, you dont need your 3rd, 4th, 5th or 6th aeg either. or your 30th mag.