I would not pursue the non Speed Premiums anymore, or at least the latest posts that I've seen from people buying non SP TwinMOS were that they did not receive UTT like some of the earlier shipments.
I run a MSI K8N Neo2 and it doesn't so as well, on average, with ram as the DFI, therefore I haven't had the same type of results, usually hitting right around 240-245 with my UTT based ram.
I believe that if I had just bought a new DFI and a San Diego 3700 that I would either spring for the VX or maybe the Reds from Mushkin. Everyone is heaping praise on them, of course, their haven't been enough reports from the regular joes to really know about the Reds.
My point is only why gamble with the ram by buying UnTesTed chips when the available budget will allow you to buy premium ram? The rest of the components are high end so don't cut corners with the ram.
(Next statement is an edit to the original post)
Its one thing if you already have one or more good/proven sets of sticks and now you go out and buy some value priced UTT to play with. Its another thing if it is your first and only set of ram for your high-end rig. In this case I would not gamble with the ram. (end of edit)
Either TCCD or UTT is going to give you great performance...but I tend to lean towards the tighter timings as opposed to the higher HTT but really, in this case there is no wrong answer.
The only real concern, and it can't be ignored, is whether or not running high voltages will have any long term affects. If you upgrade your gear every 6-9 months, then this won't matter, but if you are going to keep your rig long-term, then running 3.6v 24/7 might need to be evaluated a little more closely.