I've just recently bought a 2010 650 (3-4 months) and love it. I also own a VZ1600 (had it for 8 years, very customized) and just had a VZR1800r and got rid of that to buy the strom. The main reason I got the strom is that I can ride it in crappy weather as I never ever take the VZ out in anything but dry sunny days (the bike has never been wet). But also it's light, ok relatively speaking, still over 250 lbs lighter than the VZ and being 'old' have problems with back, hips, knees and anything else that I wake up with in the morning. I love the VZ, I would honestly say it makes me smile, but the V Strom also makes me smile, if only for the fact that I can 'chuck it' around like a toy.
But ride, whatever you do just ride, enjoy the experience again, and above all don't be goaded into buying something that is beyond your control initially, bikes have changed alot and a 650 is about as easy as you're goining to get.
Oh, and don't let the 2 previous owners issue put you off, maybe they just never got along with the bike, it happens.