Ed, I own both a GSXR6K2 and a SV650s K3.
You will be far happier commuting on the SV (which was why I brought mine), the riding position is far far better, its cheaper to maintain and performance wise the V-twin will allow for better low down drive.
The Gixer is a lovely bike, you neck and wrists WILL ache if you spend much time filtering etc. though.
Spookily, the SV is also a great bike, lost of fun, very forgiving (I've had it sideways under braking Rossi style into round-a-bouts etc) where the Gixer will sit you on the road.
If you want something focused get the Gixer, if you want an alrounder get an SV. (the finish is also harder wearing - by suzuki standards anyway)
If you cant decided do what I did and get both
