As someone who's having a bit of a nightmare getting a belstaff at the moment, one thing I have learnt is that the trialmaster is bigger than the roadmaster. So a large roadmaster would see you wanting perhaps a medium trialmaster.
If you're buying new then obviously the best option is to try on. However during my search I did find them on sale with £140 off from Motorcycle news shop
http://shop.motorcyclenews.com/produ...gn=MCN_article
Looks like all the brown have gone now so may not be good for you.
The current versions are differently waxed and have a greater shine to them. Personally I'm not as keen on these and took one back recently.
As or colour, the brown is a nice choice and different from the norm. I like the brown ones myself and even got a roadmaster in olive so giving me something different from my barbours.