2 lazers for u, personaly I'll get the second one has I like the wood grip on my 1911 and it doesn't "deface it", but it's more pricey.
Crimson Trace, with on/off on the grip itself, front or back depending, turns on when u hold ur gun.

Lazermax, with the on/off on the stop slide.

Both concepts are awsome for carrying in a holster.