I think the game was made that way and the devs put alot of thought into how the sides were to be kept even without an advantage for either. So IMO it should be left totally stock unless you want to put like a 30 round Thompson, or make the PPSH a 30 round gun, or even slow down the PPS42....things like that but, alot of people dont like the mods (including me)...so leave it stock with everything original without adding or taking anything out of the game...if you don't like it go play Pac-Man!
The only thing I would change is put the taunt mod on there so you can talk smack to eachother with the "intended" rated G taunts.