See my viper thread on this page for an R2 moonlight. I also have a powerbright fixture with four royal blue LEDs that I might sell.
Your criteria should be:
1) how bright?
2) how much coverage?
3) blue? white? combo?
The powerbrights are very bright, as moonlights go. Maybe too bright for some tastes, but a gorgeous blue color. I loved 'em. The R2 is the same color, but much dimmer.
You can get more information on both of those models from marinedepot.
If you decide you're interested, let me know. I'll be out of town all next week.