Well that one is a bit tough. With Lease, you tend to get cheaper rates and such, and you get rid of it at the end. It also means though, that you can't do anything to the car. Since it is a lease, you would technically not be aloud to do any mods or anything like that.
If you finance, you can do close to anything you would like, although you still have the get full coverage like under a lease. But you also get to keep it at the end. Depending on your credit record you may be more restricted if you finance, so that also factors in. I would say you should see what you financing options are.