Dell PowerEdge T20 and T110 II Servers

I’m looking for a server to standardize on for FreePBX and/or PBXAct installations. Does anyone have any experience with installing the FreePBX distro or PBXact on one of these two servers? Any gotchas, hardware issues, etc?

I have also looked at the Rhino Ceros units, and they look pretty good as well, but I wonder how quickly I could get, say, a replacement motherboard if needed.

I am primarily looking for something with a 3-5 year warranty and a good reputation for solid reliability.