Any cool looking, blue-ish coloured cases that you like?
Well, there is the blue prodigy but it isn't exactly subtle.
Thermaltake A21 and A31 have blue or black with blue color models. black with blue and more blue
I think there's a NZXT phantom in blue, but im not sure.
Phanteks Enthoo Primo, except its large and is done via loads of blue accents as opposed to a blue case.