The poweramp/cabs seem more in the ballpark. You'd be getting 240Ws into 2x8ohm.
The mixer's seem a lot of money for something quite limited. For a bit more you'd get something you wouldn't outgrow, while for a bit less you'd get something you'd be happy to upgrade at some point (how many mic channels do you need?). The Alesis should be better quality, but the iPod thing looks like an expensive gadget, and for that price I'd want some built in FX. For the price difference you can run a cable from the mixer to a recorder.
The Behringer has 4 mic channels, while the Phonic has 7 plus built in FX. It's also 2x220watts (a little more than the carlsbro), and is about £180, rather than the £240 you're spending, so it's probably a better deal, but don't take my word for it! I'm suprised someone else hasn't chipped in with suguestions.
Ian