Building a budget 2.1 system with the following components: Epos ELS-3 Cambridge Audio Azure 540a v2.0 SVS PB10 Here's my concern; there is no active crossover in the PB10, which means I would have to go with an external unit? Or would I be okay with running the PB10 straight up? Also the 540 doesn't have a crossover built in; so I think I'm stuck ... What I could do though, is go for the Hsu STF-2 which has the built in active crossover and the speaker pass-through ... What do you guys think? What should I do? Any similar experiences? I heard the PB10 is a step above the STF-2, so that's why I'd like to make it work with this setup.