personally, during a game of quake 3, at 1024x768 75hz, the response time seems fast enough to me, I'm not bothered at all, and I don't feel my pwnage is bothered by it.
if your someone who is sensitive to ghosting, then you may want to get a faster monitor to be safe, unless you can personally test a 1905FP before you buy.
Some stores would probably let you do this, but I don't have any experience with this. You may want to post about it, or search.