eheim pumps are great external pumps. The fittings are metric, so I use a lot of plumbers tape to fit american fittings to them. As LNell said, Eheim is not the same as Quiet One. I have used Quiet One pump before and I never had a single problem with it, but I have heard of others that have. I am currently running an eheim 1262 on a closed loop and a 1250 as the return on my 30 gallon cube. I also use a Tunze 6025 for extra circulation. I like having the Tunze in there because if I ever do maintenance, or am cleaning pumps, I can leave the Tunze on and have plenty of circulation.
That is quite a bit of light for a 30 gallon tank. I am using a 250 HQI MH on my tank and between that and my pumps, and skimmer I have to use a good sized fan to keep heat down. I have a 30 gallon cube with a 10 gallon sump (that holds about 8 gallons when operating), so one light perfectly covers the 20" x 20" size. Obviously your layout is different with the longer, skinnier tank, but I think with the extra light you will really need a chiller to help with heat.