Sounds like you're looking for a rock solid foundation to grow your business on.
Check out
www.RealityCheckNetwork.com - that is exactly what we specialize in.
As far as what you're looking for we can setup
DELL PowerEdge server
Dual 3Ghz Xeon (2mb cache)
2GB RAM
2x 73GB SCSI - RAID1 or 3x 73GB SCSI - RAID5
Backups are based on GB stored in 10GB increments
$400/mo.
Additionally with all of our servers we set them up in a highly secured environment reducing the chances of trojans and other web exploitable attacks. Our servers are monitored 24x7 and our techs are alerted at the first sign of trouble, even if apache begins to slow down we are alerted and can maintain a very high level of uptime and availability.
We have a lot of experience in setting up clustered solutions and with 2 servers you can achieve near 100% uptime.
Contact me on ICQ: 4930562 if you have any questions.
Thanks and hope that we can do business.