Hi guys I'm wanting to upgrade from my old computer speakers I've been using for years and looking at getting something like the Mackie 824 and notice they have a different connector on the back compared to my plug and play speakers I use now. What type of connector do I need to use these. Also If I connect them to my sound card ( I use Echo Mia midi and the M -Audio audiophile on the other comp) do I just plug the speakers into them, or do I need a receiver or amp? What other hidden costs would I be looking at. I want at least 2 stereo speakers, but I have budgeted for surround If I go that rout. I just wanted to make sure there is no other hidden costs I'm not thinking of. The speakers would be used as refference as I make multimedia sounds,music, and possible trailor work.