The Cisco MCS7800 series of Media Convergence Servers provide a variety of processor speeds and options to fit your needs.  Some models are available with up to six internal disk drives and RAID protection is available on some models.

Models:

MCS-7815I-2000 - 2GHz P4 Processor, 512MB memory, 1x 40GB ATA drive, DVD drive, tower style case

MCS-7825H-2266 - 2.266GHz Processor, 512MB Memory, 1x 40GB ATA drive, rack mount case

MCS-7835H/I-2400 - 2.4GHz Xeon Processor - memory and disk configuration are dependent upon the specific application

MCS-7845H/I-2400 - Dual 2.4GHz Xeon Processors - memory and disk configurations are dependent upon the specific application