SquareGems Tekkit is a fairly new factions server with an emphasis on raiding and the Factions plugin. We do allow raiding (no major grieifing though) and most Tekkit items. We have an economy with shops and anti-duping, hacking and grieifing plugins. So hackers be warned.
We try to keep our admins/mods to EXTREMELY trusted people only, as only the nicest most trustworthy players will be made admin/mod/head admin.