Of course almost any modern micro head could be used as a power amp, but the most recent "1RU power amps" thread had me thinking... which micro would be "best" at that job? Examples of parameters would include: --Fits in 1RU, or is only 1/2 rack width? --Has an input jack (like an fx loop return) that 100% bypasses the preamp stage? --Has enough wattage to bother thinking of it in "power amp" terms? --Will not overheat if racked in a tight-fitting space? I'd be interested in other peoples' ideas about parameters too. I'm only asking this out of idle curiosity--I'm not myself shopping for one. But I get the impression that many people here would find the info useful. So which one(s) do you think would best fit the bill?