In my experience, Red hat as a distro has better hardware support for servers. For example, it came with optimized Kernels for IBM LS20 out of box (These blades had Clock Skew issue with 2 CPUs that needs few tweaks).
Actually if you look at banking/ finance sector and any company that is going in for certification one of the criteria states that you need to have a licence OS.
And no redhat with it's redhat 6 is a 2.6.32 kernel which has module support for hw. I'm sure if you can get a latest stable kernel and/or compile the modules yourself you should be good to go.
Derwyn