I am really happy with my Versys, but I have to ask why you are considering trading the EX500 for the V? If it's ergonomics or you want a better bike for luggage or 2 up or even if you just want one because......well, you just want one then that's all good.
OTOH, if you are looking for much of a performance boost over the EX500, the Versys isn't gonna do it for you. I have both and although the bikes feel different, the performance is almost IDENTICAL. Depending what you read;
Versys: 59.4hp, 398lbs, 1/4 mile 12.96 @99mph
EX 500: 59.1hp, 373lbs, 1/4 mile 12.98 @99mph
I'm not bashing the V by any means, I just don't want you to spend your money thinking your getting something that is a big step up in performance. Now the ZX6R..........well that's something completely different.
2008 Versys, 2008 ZX6R, 2006 EX500, 2002 KLR650
2010 KTM 300XCW, 2007 KTM 200XC, 2006 KTM 200 XC,
2004 CRF250X, 2002 CRF150