Going to be getting a 590A1 soon. THR has a Surefire group guy going until next week. Surefire has a replacement forend with light for the 590 (actually they have 2 models). Anyone have any thought on what's best way to put a tactical light on a Mossberg 590A1? Is the Surefire the way to go (it ain't cheap--over 1/2 the price of a new 590!)