Well I just got a PE 250 watt amp. I just got a new Shiva for $100 and I found someone that will sell me a new Tempest for $125. I LOVE bass and either way I go I am going to build a box for this setup in a few weeks. Given the same amp, will it really be worthwile to get a Tempest (assuming I'll need a larger box than compared with a Shiva)? Any opinions are helpful.