Diamond is a subsidary company of Bowtech and offers the same great customer support that Bowtech does. They offer a LIFETIME warranty on all of their bows, and all of their bows are manufactured and assembled in the united states.
The past couple of weeks I have been working with Diamond / Bowtech and their customer service and employees are excellent. They were all very friendly and eager to help.
I strongly suggest you hold out for the Black Ice as it is as nice a bow as you can find. It has everything you want in a bow speed, accuracy, quiet, lightweight. But just like everyone else says on here you'll need to shoot it before you buy it. Below is the Black Ice thread and review I have written:
Forum Thread
http://www.huntingnet.com/forum/tm.aspx?m=1764757
Review
http://www.huntingnet.com/articles/articles.aspx?articles_id=517