What you failed to mention is this:
Dell's Consumer brand line - including the Vostro - has all their support outsourced. The Lattitude, Optiplex, Precision, and PowerEdge support queues are based in Tampa, FL (if I recall)
Call me shallow, but I get really tired of trying to listen to what you and I know isn't your first language trying to walk through a problem that I already know is well over your head but I need to placate you for 20 minutes before you will transfer me to someone who may or may not know a little (or lot) more then you do.... and maybe might be in my lingustic zip code as an added bonus.
We looked at switching to HP business class hardware (so glad that didn't happen) but I was incensed to find out that their CAD/BIM class machines had outsourced support, and their business class laptops were 'currently' sourced in India however HP was setting up a US based call center. For a 5K workstation - good riddance HP.