What sort of hutch are you looking for? One with an attached run etc?? I bought a run from a website called 'ukrabbithutches' and it is brilliant quality, the hutches are all a good size too, bearing in mind rabbits need a lot of space. The minimum size recommending by the RSPCA and RWA (rabbit welfare association) is a 6ft X 2ft X 2ft hutch with attached 6ft X 4ft run at least. Something to consider with a run is placing it on concrete or putting mesh under the sides to avoid bunnies digging out and predators digging in. Depending on what your price range is you may actually find a shed for cheaper, have a look on eBay
Don't have any recommendations, but is worth mentioning that some chicken houses can also make good houses for rabbits - the ones I'm thinking of are like a big walk in aviary with a roof so are like a big covered run that you can walk into, and they have a ramp to a raised "hutch like" sleeping area. Although bigger than the larger rabbit hutches they can sometimes be cheaper than hutches made for rabbits - think it's because they are a "livestock house" rather than a "pet house" and "livestock supplies" are often cheaper than "pet supplies".
The size of hutch depends on the size of Rabbit your getting, Lizzie has put the sizes up.The bigger the hutch themore room for your bunny to hop in.
You can also but hutches with runs attatched if you have room for one, the rabbit can venture outside then go back into the hutch part.
Pets at home have hutches and runs etc, but be willing to pay alot from there for one.
Let us know how you get on in your search .