Clarion.
Review - Over 100w / channel.
Clarion XH5410 4-Channel Amp Review - Amplifier Reviews - Car Audio and Electronics. I'm leery of any kind of bandpass crossover with dials (they WILL move over time) but hey if its your thing, why not? I'm an Audiocontrol purist on active crossovers and you can get a 24xs for $50 if you look around. I also go with Clarion because I live close to a licensed Clarion repair station and they have a pretty much no questions asked policy on warranty work with Clarion. PPI I cannot say, although thats not to say they dont. YMMV.
MB Quart
If you only want bass, then "ra-ra go class D". I understand the small footprint is cool, but if you're only using a single amp anyway, I think the class A/B MB Quart is not too big. 150x2 + 440wx1 all at 4 ohms is a great amp for $200. Plus, living in Canada, you'll have yourself a nice little space heater in your vehicle?