Sounds like from your party make-up, that your paladin is the melee combat specialist, so I agree, bump up Str to 16 (and if human, put the bonus here) with Cha as your second most important stat - then choose whatever the player wants after that based on skill sharing with other PCs, etc. While clerics and druids can be decent combatants, the paladin is your only full BAB class - most hp and best BAB, so he should be better statted for melee.
well, one guy that is more experienced has offered to not play a wizard to help balance out the party...so, the group's makeup is in flux.