The red Dominator GT is the next step up from the blue - faster, tighter timings, even better overclocker, MORE expensive lol
This is my designer brain talking: if you're going for the Classified then red or black RAM will look gorgeous. Those with high-budgets naturally go for the Dominator GT because of the colour and it being high-performance RAM to match a high-performance motherboard. There are other options though, such as Patriot Sector 5 Viper II.
I got some 1333MHz CAS6 for my Phenom II build and I'm very impressed (looks sexy too), so I'm toying with using it in my own Classified build - it overclocks to 1600MHz nicely if you loosen the timings very slightly and also comes in a crazy 2000MHz model which is as good as the Dominator GT yet cheaper.
For bling there's also Crucial Ballistix Tracer RED which is good RAM at 1600MHz.
The Thermalright Ultra-120 is a great cooler, but if you're thinking aesthetics then the TRUE Black is a must to match your black and red mobo/RAM theme. And the new Radeon 5000s are black and red too!
Now, kick my designer head out of the way lol all this is pointless if you don't have a side window, or you simply want performance.
If you're not doing crazy, sustained overclocking then the Classified is probably a bit of a waste of money, so is the premium you pay just to have an Ultra-120 nickel plated in black. Dominator RAM will usually overclock and/or tighten to compete with Dominator GT (it's the same chips after all), plus there's other RAM out there that can do just as good a job anyway.