Heated grips are nice, although I do not have them on my Busa. I use larger Cruiser style grips on my Busa. They are more comfortable to me. Before I switched, I rode a friend's Busa that had them and got back on mine and the stock sportbike size felt like pencils in my hands.
I purchased mine off Ebay for about $20 almost 9 yrs ago. I still have my Gen 1 and can't let her go.