Help me pick a sub!!

[britbill4000]

Hey All,

I recently upgraded my system and really need to replace my Sub now. Here's my current setup.

Receiver: Onkyo HT-RC370
Fronts: Polk Monitor 70
Center: Polk CS10
Surrounds: Polk Monitor 60
Sub: Polk PSW10

I'm in Canada so I don't have access to all the great deals across the border. I either pay high shipping/duties or inflated Canadian prices. I have narrowed it down to 3 choice.

Klipsch SW450 - $300
Velodyne VDR12 - $340
BIC F12 - $275

I'm leaning towards the BIC F12 as it's the cheapest and I've read alot of good things about it. The only reason I'm a little hesitant is that's the only one that I can't buy locally so once I buy it I'm stuck with it. Based on the specs it would seem the Velodyne and F12 both go as low as 25Hz but the Klipsch goes to 28Hz. Is this a BIG difference? Am I being silly even considering the Klipsch?

I appreciate any advice...