I'm not sold on Dell servers yet, as my previous job didn't really give me much appreciation for them. In every regard they always seemed at least 2-3 years behind the Proliants in terms of features. Though, I suppose thats where some of the cost savings comes in.

I'll be eyeing the blades from Dell to see where they go, as it's clear they copied a lot from the HP Bladecenter systems.

Regarding XServes, pretty much agree with you there. They are ok boxes, and bundled with OS X Server they can make a great solution for a small business. But I don't see them hitting enterprise level with the way they currently are.