The "slight fishtail" may be caused by a rear tire that is not properly balanced. The highway pegs look like a good idea. Check out the Maxxis 50/50 tires, I just removed a worn out set from my 650L. They worked good ont pavement, but not good enough , for me, in the dirt - excessive rear wheel spin and the front never liked to stick in the corners.
If you happen to be riding through Saskatoon, PM me.
Best of luck and have fun.
Jeff