Ok, here's my two pence worth.
Today I took out a 2008 GSA for test ride. How does it compare to my (07) GS Lite?
Definitely a taller bike, so can't get both feet flat on the ground. Not a problem though, easy enough to slide across a bit and plant one hoof firmly. It does mean though that the distance between seat and footpeg is a bit more, so didn't feel the need to stretch legs out while riding.
The bars seemed a bit lower, and dealer confirmed that for 08 the bars are different and for best off-roading position a tweak to their position would be in order.
Screen definitely better than GS Lite. Also, importantly, IMHO seat was more comfortable too. I don't really have issues with standard seat, but it was somehow more squidgy.
What did seem odd though was that it seemed to be revving far highr at given speeds than my 07. On more than one occasion, despite the gear indicator at 80ish looked for next gear to find it wasn't there. Again a chat to dealer after confirmed that gear ratios had been changed for 08.
The bigger tank etc was in no way off putting, bike did feel different at front end (not bad/worse or better, just not the same).
The 08's have 5 bhp more, but to be honest I didn't notice. Demo only had 450 odd miles on it though...
So overall IMHO the GS Lite is a great ride and will do anything that I've ever wanted from it (except hold onto it's vario cases..)
BUT the GSA has the edge...
So much so that order was placed and delivery scheduled for back end of June.
Seems experiments for science can be financially costly

but that's life.
Overall in response to original question, as loads of people have said it is a case of trying both and preferably back to back. Then making your own mind up as it doesn't matter how much people put on this site only you will know what is best for you and nobody else's opinion at the end of the day actually matters..
