i use to have a schumacher mi3.. 4wd belt.. i hated it, get a stone or it gets to dusty it fails...

BUT....

my friend has one and he loves it...
as the dude firestriker mentioned its what you like, also if you can get the back up parts for it...

shaft it easier in a way, and wont cause to much prob's,, but a belt imoa is smoother on a nice surface...

look at if you can get parts, if its able to be upgraded and also if the company.. e.g, xray, hpi has a good customer service!!... if something goes wrong you dont want to phone them and they laugh and hang up!!...[X(]