Hello,

Take a look at our WIRE-2 Reseller Hosting plan, I think it matches your requirements perfectly.
http://www.wirenine.com/resellers/wiretwo-hosting.html

Price is $39.95 per month | FREE Setup.

Plan Highlights
* 10,000 MB Disk Space
* 100 GB Monthly Transfer (Bandwidth)
* Unlimited Domains and Accounts
* 1 IP Addresses Included*
* 99.9% Uptime Guarantee
* 60 Day Money Back Guarantee

Server Specifications
* AMD Dual Opteron 248 (2MB Cache)
* 4 GB ECC DDRII 400 RAM
* Linux Operating System
* Apache Web Server

Servers are located in Dallas, TX at the SoftLayer Data center.

You can upgrade to any of the higher level packages free of charge, upgrades are easy and are done within 12-24 hours.