OK im thinking about adding an 2channel amp for my fronts, I want something in the 300-400watt area. What is the deal with amps like Crown that are $300 and amps like Outlaw an Adcom that are alot more per channel? Im thinking of maybe even a 5 channel or 7. Im really confused about the whole thing. My avr has 130 per channel and I know thats not the real wattage, will I hear a big change by going to 300-400 watts?

2-M80v2 VP150 4-QS8 EP500 DENON 4306 Panny AE900 Toshiba HD-XA1/PS3