[Wlug] MySQL Server Hardware

Howdy All, I work in a place that has traditionally used Sun Sparc hardware running Solaris to host a production MySQL environment. We are going to be replacing our database servers this year and I am trying to determine if I want to maintain the norm or if I want to try to change. I am interested to see what other people use for hardware/OS for a production MySQL installation that requires a high amount of uptime. Thanks in advance for any replies. -John Westcott