I'd say work with the arrows you have. It sounds like you're in need of Easton's Tuning Guide. You can get a copy at www.eastonarchery.com, www.huntersfriend.com, or there is a "sticky" at the top of the Tuning section on www.archerytalk.com (follow the links). This should explain pretty much everything you need to know about broadhead tuning.
Right now it sounds like your nocking point (loop) is too low. Raising this would make the arrows shoot lower. It may also help with them shooting to the right, but you won't know this till you make the proper adjustments.
If the arrows still plane to the right you may have to move the rest to the left in small increments till field points and broadheads are hitting together. Usually arrows planing to the right indicates an underspined arrow, but every once in a while it's just the opposite. If moving the rest doesn't work you can try centering the rest as well as possible and turn the bow weight up or down a turn and see if this helps.
As for the Tuning Guide---read it before you do anything. Pay particular attention to the next to last paragraph at the bottom of page 7. A lot of guys miss this important info.
If You're Not Living on the Edge You're Taking Up Too Much Space
Martin/Rytera Staff Shooter
PSAA Life member, UBP Life member
PADI AOW Diver