You beat me to this as I've been thinking about it for a week or two. No doubt and no other contenders even come close to Marble Summer.
I don't know what those boys do that's so different to everyone else, but despite trying a wide range of top quality ale across the country, Marble beers for me are head and shoulders above the rest.
I suspect it's a combination of exceptional brewing skill and top quality, organic ingredients but if anyone has any insight into how they achieve what they do - do the organic ingredients make that much difference etc. - I'd be interested to know. Although not as interested as in finding a local boozer in which to drink this nectar.