Alternator Recommendation

I have been thinking of going to a 1 wire alternator (Powermaster 140) also, as I think my 100amp might not be enough. I have added 20amp cooling fans and a 1200w amp and subwoofer.

A one wire is OK to use, I would just be sure to use a good wire to get back to the battery. 4awg welding cable works nicely. It is also a good idea to elimnate the current gauge and go direct to the battery. I made the mistake of connecting my 100amp alternator to the factory amp gauge and quickly let out the magic smoke.