Keep Minsc.........when u like roleplaying hes ure man, not only cause u get him from BG1 (well at least I did), but u also take him from the beginning (which gives him more exp then the rest allready)......Then there is the fact that hes just completly psycho in his own way.....which makes him IMO one of the most funny characters
If you just like powergaming Minsc isnt bad either. he can deal alot of damage with 2handedswords or just 2weaponstyle with any weapon you can think of. In most of the battles I can relly on him.......and frankly, its a rare moment when he dies
In the end its ure own dicision.....but taking him along is a good thing to do.