When I got my new bike, I chose not to put a computer on. I still do a basic tracking of miles (I know how many miles all my regular routes are), but I try not to worry about speed. It's something I still struggle with. In fact, if I look at the clock before I ride, I'll often do the math later and calculate my speed, but at least it doesn't ruin the ride.

Since you've need recording speed and miles for so long, BSG, it may be hard to give up. But, in the end, it's made riding much more enjoyable for me. I can't wait to hear if you find it better, too.