I'd recommend at leasst skimming over this
. It explains what a sump or wet/dry is, the differences between a wet/dry and a sump, and why a sump would be good. Truthfully I'd go with a sump because of the advantages, but if you can't afford it or don't want to shell out the cash for it, then go ahead and use the wet/dry. They both would work, but I think the sump has more advantages to using it.