I had a Razer BlackWidow Ultimate 2010 -Mac for about five years now. The Cherry MX Blue are perfect for writing/coding. The typing sound is thunderous and noisy - distracting at night.
I upgraded a couple of weeks ago and bought a Razer BlackWidow TE Chroma - Silent and exchanged some keycaps from my old Black Widow Mac keyboard.
I wanted a mechanical keyboard, with LED, TKL design (TenKeyLess, 60% Layout is too small for me and full-size is too big). Razer Ultimate TE Chroma is quite good. Customizing the lights on OS X is possible but limited compared to Windows driver. The typing sound is quiet but sounds a little scratchy - if it's not Cherry MX - it's not Cherry MX!
Divided the keys into groups and used some HUE colors.
But I like the 80s colors a bit more now, and it looks good at night too.