On my 2010 V, I installed Speedy's lowering kit, and lowered the front following Speedy's instructions, easily with no problem. I lowered the front simply to get the seat height down a bit more. For my riding, mostly below 60 mph on twisty back roads, there's never been a handling problem. Also fine a couple of times at 90mph on the interstate.
Then I installed a HyperPro progressive lowering spring on the rear, which lowered the rear another 30mm (1.25"). Bike is lower. Handling is fine. I'm sure a gourmet rider could see a difference, but I couldn't. I liked the ride comfort with the progressive rear springs, so I installed HyperPro progressive, 30mm lowering springs in the front. Lowered the front 30mm, eliminated most of the "dive" when front braking, improved ride comfort some more, but otherwise could not see any difference in handling.
So, while lowering the rear changes the "rake" I didn't see any effect on handling. I say lower the front, if you need to lower the seat-height more. Otherwise, don't worry about it.