Bigger is better right?

[matt_C]

A bubble magus curve 7 would work out perfectly for you.
as for a return pump yo would want something in the 700-900 gallon an hour range even high if you plan on running reactors and such off of it.
Depend on the noise level mag drives last forever but are a little bit louder, eheim 1262 is a great pump but still loud compared to a DC pump
There arew many different options when picking out a pump. just figure out what one is quiet enough for you.
For the sump just make sure you have a steady skimmer section to make your skimmer perform at the best for you.