I'm gonna go with blue on this one.
Heres a good example of Red and silver on a case. They just dont seem to get the same effect as blue and silver.
Red and Silver
sure, that particular example is a re-f***ing-diculous looking case (in my opinion) but, it does show the two colors together.
as for the blue and silver, i found this, this,
(the third one being yet another ugly case, but you get the point.)
I hope everyone has taken a look at the Thermaltake Tsunami VA3000BWA