Grant: I noticed that Trijicon also makes the RMR (non battery) in a 7 moa as well as the 9 moa and 13 moa.
As far as optic base compatibility goes the Trijicon MRD & Jpoint are the same. Docter, Burris FF & Insight MRD are the same. Trijicon RMR is not compatible with any other base unless a spacer/adapter is used.
If MRD's and RMR's work out for you, then you should consider having your slide milled as it makes a big difference in sight picture acquisition (much closer to center bore height).
JMHO,
MadDog
ETA: Here is my Trijicon setup after trial and error. Grant, I hope you don't mind a couple pictures.
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