I have a high seat, Ducatis own, there right about lowering the bars, but I did it for the comfort, my one is now ripped and I took it off to send it back, I went for one ride with the original seat and had to put the ripped one back on, how you put up with the original seat is beyond me.
I had one of Pro Twins seat's which I sold with an HCRactech GP unit. It is good for the track, it raises you about 11 or 12 mm and you do notice the difference. I tended, as I say, to keep mine attached to the whole seat unit so I could switch it over in about 10 mins. For normal road use I normaly kept to the standard seat as I found the raised one put more pressure on the wrists.
Only my experiences ofcourse, it probably also is different depending on your hight and length of back. I am 6'1".