I´m using: 2 Electrovoice EV SX500 (Two-way 15-inch full-range system. Continuous 400 Watts, Peak 1,600 watts, 8 ohm. The manual from EV recommends 600-800Watts for normal use & 800-1200W for professional use.) 2 18" Cerwin-vega Sub-18 (Continuous 600 Watts, Peak: 1200 Watts, 8 ohm). We mostly play smaller clubs with 100 - 300 people. (I've looked at the SX-series and they are within my pricerange). What Crown amps should I get for this setup?