Many, many choices.
So I watched half of the first episode of Ikkitousen
... Gorgeous girls, shit show. The MC was an exceptional milquetoast, the characters and backgrounds were excessively plain, the animation was flaccid; yet despite being a panty-fighter series, the fanservice in the anime was incredibly light. A pantyshot here, an underboob there, a little shading to highlight a character's curves... and that's it. Don't believe me? See for yourself!
I can say with surety that I would've had a better time watching a slideshow of fanservice shots from the manga.