i ran a 125/80/17 front with both the 195 and 200 rear. the 195 does grip a bit better in the meat portion of the tire (getting on the gas after picking up off the edge) but the 200 is so close (and cheaper by $70 or so) that it really never made a difference to me. the 195 and the 200 are very close to the same profile so saying that you can tell a difference at tip in is a bit strange.
i wouldnt lower the front. just bet a bit bigger front tire.
in the end, if you want the same numbers as what you are used to, you need to measure your bike with what tires are on it. switch tires and re measure. adjust your ride height back to where it was originally.
i dint really mean the comparison of 195 - 200 more like the 55 - 65
The tires and numbers on the tires you are throwing out are really irrelevant. If you want you're bike to "flick" you need to do a couple things.
1 - Make sure that you're geometry is set correctly. Factory geometry sucks and usually you need to move the forks in the trees to get proper geometry.
2 - get you rear shock and fork internals sprung properly for you're weight and riding style.
3 - Have you're suspension properly setup for you're riding style and pace. If you start getting quicker on the track and drop your times a couple seconds, you're setup will more than likely have to change. But to he honest, once you get there, you'll be more worried about tearing up tires than having the bike "flick"