Out of those 3 the RB easily takes it. Both of the others are Sirio's and known for having cooling head problems(too small, get really hot). But I agree with houston the nova limited is also a very good choice and probably cheaper than the others.
http://carolinasrc.com/Webstore/Scri...?idproduct=727
You can also save 10% at carolinas.
Discount Code:
$50.00 - 449.99
10%
RCAPR910
Edit: they sell the RB too, and the other 2 on the list.
http://carolinasrc.com/Webstore/Scri...idproduct=8802
http://carolinasrc.com/Webstore/Scri...idcategory=318
The discount would apply to all of them. Backorders too.