My preference if I had the spare money to get one is for the British 18W style combo. Has a pair of EL84's on the output and comes with a Celestion G12M Greenback... My kind of combo ...
Not keen on their JTM45 kits as they have made changes to their kit circuit which are not in the published Marshall designs. I suppose the changes could be undone but as I already have my 2204 clone build the desire has waned substantially.
Maybe it's just me but I prefer the British EL34 or EL84 grunge sound over the American 6L6 or 6V6 cleans. Probably why I have built my 2204 clone and own a real Marshall JVM210c, and only ever fixed other peoples Fender amps.