Thanks for the replies.
I've tried renaming the suffix to .html in vm2 but this creates a problem if the joomla config is also set to include a suffix, the result is on product pages you end up with .html.html
Perhaps if we could stop the joomla suffix from adding to virtuemart product pages ?
As for the other argument on the suffix not hurting seo, i suppose this depends on what suffix your using. Default suffix formats like .html .htm .php etc i can agree wouldnt hurt seo one bit although urls would look much nicer without them. The default vm2 -detail suffix however isnt common and worries me somewhat, new google algorithims could see this as spam especially when you consider its on the end of every product url. I suppose eventually they would learn but until then i would be quite worried.
Personally i would prefer my urls to have nothing on the end but the product name, no suffix at all but i guess this is how it is.
If theres no solution or possible hack it looks like im rewriting all my urls