Informix on SUN vs HP

Hello Informix World, I would like to hear your comments if you are using Solaris/Sun and/or HP/HP-UX in your shop, and what your satisfaction has been with these hardware and Operating systems. We have an OLTP application with a relatively small number of users (approx 35), and a 6 gig database running under SCO today, and we plan to mirgate to either a SUN or HP solution. We plan to grow quickly over the next several years with the number of users approaching 200. We are considering an HP K360 or a SUN E4000. The HP K box does not appear to scale over 6 CPUs, but HP is convinced the performance is competetive with Sun. I'm very interested in hearing about OS tools/admin tools, the ease of allocation of disk space under RAID, and the stability of the Informix/OS combination. Thanks for your comments .... J. Dority