My first owned pin was a T2. I think its a great place to start. Though not deep, as mentioned it was reliable and entertaining. I only sold it because 18 months was beyond my attention span and I wanted to move on to something new.
I played JP years ago on an work owned machine. I know I LIKED it, I just don't remember much about it.
If you take the time to play a couple of games on both, you will probably have a gut feeling as to which one you really want. Good luck!