Sorry it took so long to respond, I was ridin from SoCal to Oregon...no Internet.
I just used a set off a Cbr. They cost me about $30, they are 1mm bigger so you have to put a strip of rubber on the fork tube to get em tight.
As far as handling low speed and tight they are not usually an issue. I find the hardest thing to do is turn it around in my garage or on my driveway. Once you're moving though you don't really notice them. I've gotten totally used to them and won't go back.
You might also notice I didn't lower the forks on the trees to put them on, I put them UNDER the trees so i don't know what that does for handling as oppossed to dropping the front.