I need some advice and recommendations

Hey guys,

I was originally going to run my Treo Engineering SSX 18", but decided I don't want to go through upgrading the alternator.

Where is the most you recommend running off the stock ALT with an upgraded battery? Can I get away with 2KW?

I'm looking to run 2x15's now, something around 750RMS. I'm not to familiar with this power range, what do you guys recommend? Something around $150 each preferably


 
thanks