Which DeepWater Aquatics pump for basement return

[Kayadad]

I have a 40 breeder with a 60 gallon basement sump. I have around 13' of calculated head pressure. Looking for somewhere around 300-400 gph. I am looking at the Deepwater Aquatics BLDC 8, but wondering if I should spring the extra $30 and get the BLDC 10?

http://www.marinedepot.com/Deepwate...s-Deepwater_Aquatics-PL00527-FIWPEPOH-vi.html