Sorry too late for the water change recommendation but if you like ideas for the basement sump then try this:
Because you will have lot more space try installing the equipment on shelves that really makes maintanance real easy.
Also try building a drip box around the equipment, That will save you a couple of basement floods, a drain nearby is almost a must and a large sink for rinsing and cleaning equipment is a plus.
http://home.comcast.net/~jdieck1/equipment.html