Have you sat on an SV yet? I'm roughly the same build (slightly shorter legs) and can touch on both sides. I'm not flat-footed, but I'm confident just about anywhere. As a matter of fact, I had mine lowered but put it back to stock. It's actually high than stock now because I have a ZX-14 rear shock.
A Corbin seat should get you all the lowering you'll need - 1"-1.5". If you don't want to spend $300 you could send your seat to Great Day to Ride
. He can lower it .5"-1". I recently had mine done and I absolutely love it. While it isn't drastically lower, the difference in comfort is great.
You can lower it if you wish, but handling will be affected. It will become difficult to turn and you'll lose cornering clearance. Taking off the peg feelers, rearset rises from SV-Racing-Parts (look in the vendor section) or full aftermarket rearsets will help.