I have 2 servers with following specs. Dual Xeon 5520 2.26 GHz Quad Core, 6 GB Ram, 4 x 500 GB HD, RAID 10 [ Multi-Core processor, 1 TB of RAID 10 Redundancy ] and 10 TB of Bandwidth on Gigabit (1000 Mbps) port… (Budget: $250-$750 USD, Jobs: .NET, Active Directory, Apache, Apache Solr, MySQL)