[ubuntu] Help me find Dell boxes!

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http://ubuntuforums.org – I'm looking to replace an old PowerEdge 2450 that I have in a data center. It's a fairly low traffic web/email/ftp server. I'm also looking for a Dell tower box to put at home on my FIOS connection so I can put a few 2-3 TB drives in it and use it for a home media/home network server. Ideally I'm looking for particular model numbers that I can find used that support Ubuntu very well. Used boxes that are maybe 1-2 years old have generally worked well for me in the past. Hoping to find Ubuntu friendly RAID models as well. For example, the "PowerEdge 2650 with the PERC 5 has worke (Hardware)