Just a quick note to the OP, when manufacturers state 'you need 30A on the 12v rail', this can be 30A (or more) on a single rail, or 30A over a number of 12v rails (ie 12V1 = 18A, 12V2 = 18A, Max Combined on 12V = 32A, etc.). This confuses most people, because they see that they need at least 30A, but only see PSU's with, say, 18A. What you're looking for in such a case is the max combined 12V amperage (some manufacturers won't list it, or at least not easily visible), but don't just add up the voltage from each individual rail (actually look for what the manufacturer specifies, if you can't find it, try another PSU =P). Anyway, back to the topic....
Enhance ENP-5140GH - (28A) - Ought to be easily enough (depends on your setup), but doesn't quite meet the recommended 30A.
Enermax Liberty 400W - (30A) - Modular, also not as efficient as the Enhance/Silverstone units, IIRC.
Enermax Liberty 500W - (32A) - Same as above, but more power.
Silverstone Element 500W (ST50EF or ST50EF-PLUS) - (35A or 36A, respectively) - Actually built by Enhance.
Enhance ENP-5150GH (I can't remember off the top of my head, but i think 36A?) - Cheaper than the Silverstones, but doesn't have the sleeved cables? I believe the ST50EF's are based on the same unit? (Haven't done my research =P).
Those are just off the top of my head, others may give you a few extra suggestions.