Mikey:
I just got my 3rd drum machine; Boss 770. It has great sound and many, many patches of all types of rhythms: Latin, Rock, Fusion, Confusion, etc.
It also has 400 spaces for your own drum pattern creations. Although it takes some time to create patterns, it is a good way to LEARN your drum machine.
Rent a 770 and see what I mean. I also have an Alesis but the 770 is better. The Yamaha drum machine I first had was "nice" then; however, no comparison to the sound quality of the Boss 770.
Best price I found for the 770 was about 361 dollars plus shipping from Full Compass.
Happy Shopping,
Green Hornet