I would do it manually either with AudioSnap or good old cutting and splicing. If the general feel of the playing is good but there are mistakes here and there, I would definitely not use any form of auto quantising scheme!
Manual drum correction with AudioSnap does work but you have to keep your head cold and know what you're doing throughout the process to avoid messing up the phase relationship between the tracks. Cutting and moving is only slightly slower but much more forgiving IMO.