Depends on your budget, and what you plan on welding.

Clarke do some tidy migs, I've just bought one which is gas and gasless. 24 amps lowest setting and only 90 at the highest so ideal for body work.

I learnt with a ferm gasless which is good for thick metal but shit on body work with no power settings, just a high and low.

Get a gas one rather than gasless if it's for body work. Wire's cheaper and gas gives a smoother cleaner weld so less work smoothing back the weld.

Have a look at machinemart