I have a owned a couple P7 lights and Malkoff P7 and MC-E drop-ins. They are all bright. I just got a Maglight P7 built by Nailbender and it is so much brighter then my smaller P7 lights.
If you want a small Wolfeyes sniper light that makes 400 to 500 lumens out the front then stick with what you have or get a Malkoff MC-E drop-in; which was what I did. Small 6P light with plenty of power.
If you really want 700 to 900 lumens you have to go bigger. I like the Legion II and my 2D Maglight P7 running 3 C NiMH. A P7 making 700 plus lumes will heat up and require good heatsinking. My P60 P7/MC-E drop-ins did pull 2.8~4.5amps, but they are no where near as bright as my big Maglight 2D P7 at 2.8amps. I carry the Surefire 6P P7 daily, but the Maglight 2D P7 not so much. They all have their purpose, but if you want more IMHO you might have to go bigger.
One more thing to consider is how long the light will make the 500 or 700 lumens. My P60 P7 (or single 18650) lights can only hold the 2.8amps for short periods and then drop. My P7 Maglight I checked the amp draw after 2 hours it was 2.8amps. Similarly; the Leggion II has a run time graph were the lumen output stays the same for 2 hours.
bigchelis