Just got a 2500 and dug up this thread. . . first post!
I found this.. looks durable enough (all plastic, hard shell) as long as you're not leaving it up to other people (ie, i wouldn't trust this as a flight case where my machine leaves my sight.) Interior dimensions are 19 x 13.5 x 6 (2500 = 16.3 x 13.1 x 3.7) So there are a few inches in length and thickness for foam, a few cables etc..
4 colors available includes cubed foam for $38 from the website.
http://www.plasticase.com/productdetail ... 40&lang=enany other ideas since last post?
~Steve