Thanks for your advice guys, I read about the 4 kilo kits in a book by CJJBerry, titled Home Brewed Beers and Stouts. I have a standard muntons larger to do first but i will give the recomended kits a go later.
I intend to have a go at brewing from scratch eventually, i have the boiler and mash tun already but i reackon i will do a couple of kits first. I hear woodford werry is a good one, have you had a go at one of those??