Why buy a crank new and buy all new rings for it? You don't have to.

If you're going to spend $400 for a crank, and you want a nice one, look at the TA Carmina. You can get any length arms from 155 to 185, choose your BCD(no "special" rings required") Get the 110/74 spider, they have them in Silver, not black as shown. The spiders are removable and interchangeable. A nice 156mm Q factor too.

On top of that you'll get 3 TA rings of your choice. These are arguably the best rings out there. 9/10 speed rings.
http://www.bilenky.com/store/scripts...p?idproduct=71

Ignore what the web site says about BCD,BB and Chainrings, they just give that as an example as the crank is sold to your specs. Call or email them.

Here's more on the TA website: http://www.specialites-ta.com/produits/ped_car_gb.htm#
Click on the "more product info" . It tells you about all you need to know about them.