DIY timing belt changes are great... unless you don't have any of the proper tools to begin with, and if you can't borrow them. Keep in mind that a good torque wrench, crank pulley tool, sockets and breaker bar are the minimum - that'll set you back almost $150.

A good, independent mechanic should be able to do it for ~$200 labor + $200 in parts (belt, wp, tensioner). Unless you have a newer car under Acura warranty, avoid using dealers for service. As many owners can attest to, you are not guaranteed the best service, and they are significantly more expensive. Just my 2c.