For that money I think you can do much better than those, if you go second hand. Behringer BDI21, some little power amp few hundred watts for not much money on ebay, and a [url="http://cgi.ebay.co.uk/Monacor-MMX-4-4-channel-line-mixer-micro-mini-size-/130407115671?cmd=ViewItem&pt=UK_Mixers&hash=item1e5cdeab97"]mini mixer like this[/url], plus whatever cabs you can get your hands on will cover those requirements with a handful of adapters. I reckon that would sound shockingly good, far ahead of those little combos.