P60 is very lego-able.
Without the battle-cruiser price tag and recognition, SolarForce is the poor-man’s SureFire.
Here, you can use my needle: http://www.solarforceflashlight-sales.com/product.php?t=FA
Technically, any P60 emitter module/pill can drop into both torch brands.
Check out Vinhnguyen54’s P60 sales thread for options.
At BLF as it seems however, C8 is the most popular, with its superior thermal path and a several-times-bigger reflector. The Convoy brand of C8 is the way to go, displaying better craftmanship and a disconnection from the xxxxfire brands. I like SF more as it offers a large array of variations and add-ons, especially the belt clip and McClicky switch upgrade, while the C8 have but a few after-market options. If you build a fleet of C8’s with different emitter pills, that still count as being interchangeable.
The P60 and C8 are not compatible.