Before you buy the Clarke one, I will say that the wolf one you linked is absolutely ideal.
I had one (although red and from eBay) and it was really nice to use. Pretty decent quality too. I had to chuck mine after a few weeks though as my garage got flooded and the welder was ruined.
I did however recommend the same welder to another member a few months later and he bought one. I received a PM a few months after thanking me for the recommendation and told me it was working really well.
I currently run a snap on Mig 130 ( Cebora like the MAC ones) which is fan cooled and is a great piece of equipment. I bought mine second hand with a toolbox full of spares, a shield, gas bottle, gauntlets, anti splatter spray and spare wire reels for £100.
have you considered buying used? If you do though, take along someone who is an experienced welder as you might not know the difference between a good machine and a lemon if you have never welded.
Ben