I was browsing Musicians Friend and found the Nady SPA power amp series. They're below $300 an have some huge power ratings for little cash. Are they good?? I know people always swear by QSC, Crown, Crest and Mackie, but for half the money I could get a really powerful amp for almost any situation. I really want to know if they're reliable, if you've tried them or know of someone who has. I know Nady is not a bad company and they make quality products but I know nothing about this new amps quality. Help!