Specialized BG Gel - Expensive (23 quid) and don't last. In my case approx 2 months of riding. Good padding though until it disintegrates
Assos - I forget which model of Assos mitt it was but they cost 25 quid as a Ribble special offer. Features: great, loops to pull off, wicking fantastic. Padding utter rubbish, they seem to have some very thin foam in them that is utterly inadequate. Won't be getting any Assos gloves again.
Madison - the padding wasn't great but they are still going fine after 5 years
Mike Dyson - the "washable gel mitts" have great padding, reasonable wicking and have lasted me a year. Also fairly cheap