I'm planning on entering my first 24 hr endurance event next Jan at Sebring and would really have to upgrade my computer. I'm currently using a el-cheapo Bell unit that has served me well during training and century rides, but the fact that I have to compute my actual average MPH after the ride (since it only computes the average MPH while moving), plus having to use a non integrated HRM is getting annoying to say the least.

Downloading capabilities would be a plus but not necessary- same for GPS (are there any that get over 15 hours on a charge?)

Any help is greatly appreciated.....