Okay so I started out my life as a soundguy using all powered gear. I'm putting together a passive monitor system for some larger outdoor type events and I'm looking at amps to match with my yamaha sm15v's. I understand enough about amps and speakers to know that you do want a little headroom without pushing too hard, while also not using an underpowered amp and crushing it to get enough volume. I've heard people say get an amp that will put out about 1.5 times the program rating of a speaker. I'm hoping to get some of the crown xls amps to keep weight down, and I know they sound great (and the prices of them all just dropped a bout $100 bucks each). Would the xls1000 be my best bet at 700 watts bridged mono 8 ohms? Or would the added headroom of the xls1500 (1050 watts bridged) be a better choice? Thanks for any advice!