PSB Subseries 1 "good enough"?

I'm looking to get a subwoofer to complete my 5.1 setup:
Yamaha RX-V3900
Fronts: PSB Image T6
Ceneter: PSB Image C5
Rears: PSB Alpha T1

My room is about 13'x13' with hardwood flooring. I know nothing about subwoofers. I don't need anything too fancy and want something to match the PSB Image series speakers. There is a Subseries 1 on sale for $250 CND. Would that be sufficient or would you recommend something more powerful (Subseries 200 or 5i for example)?

Thanks.

Sorry! I didn't realize there was a dedicated subwoofer forum.