GTS Tekkit is a great, medium sized minecraft tekkit server for young and old players alike. This is a WHITE-LISTED server that requres an appication to join. The server is located in Australia.
GTS-Tekkit runs everyday in afternoons, past midnight till early morning. Weekdays: 3PM till 4AM EST Weekends: Earlier till 4AM EST
GTS-Tekkit has the latest tekkit build with only a few Equivalent Exchange items removed. These items include energy-collectors and some griefing rings and amulets.
There are anti-grief plugins in operation that allow you to set up zones to protect your land. Zones also exist to block entry by other players.