It's only about 190 total gallons total w/ the sump included in that but yes it is sweet! I bought 1 300w today (that was all they had) I will get the other this next week.
I would stick with the basement sump for sure! They're great in the summer time to keep the temp under control.+1 on the dual heaters.Haveing a fail safe is always the best plan.I personaly like the titanium heaters and if your useing a controller they work great.Good luck