3 guards, 1 sf & 1 pf/c works great, especially if the sf can rebound - but even w/out the sf being able to rebound - the turnovers produced will even out the lost rebounds. we (rollins, smith, d2) consistently produce fewer rebounds than our opponents (33.1 to 36.7), but we force our opponents into 23+ turnovers per game and out steal them 12.9 to 6.9 per game.
don't get too caught up with rebounding - don't get me wrong, it's an important part of the game - but if your guards have good ath/spd/def #'s, you should do ok.
i haven't tried 4 guards and 1 big - that might be pushing it.