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smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> Here's How << 
I don't think you can go too wrong with a Robbins top, I just fit one on my 3A and am very happy with it. Of course there are more expensive options out there if you want to go mohair or something, but for vinyl I think Robbins is what I'd pick.
Internet is your friend in finding best prices, TRF, Moss I think carry Robbins - I bought mine from topsonline.com and think I save a few bucks at least when I bought it earlier this year.
Guy-
Despite living in Houston which is known for rain, we have been in a pretty decent drought for over a year so I've had no significant testing of the top and my installation prowess! I posted a few pics of the details of the Robbins top with flap on the TR Register forum (been a member since 2007 when I lived in the UK) since it may help others less familiar with the brand.
Randy