Ok, first thing is first.........stop listening to your friends, lol!
Stay on here, and be open to suggestions.
Ditch on or the other brands. I would keep the solo and run some clean power to it and get rid of the visonik crap. You pay for what you get most cases, but almost always comes down to install.
I would build a different ported box for that sub, give it 400rms from a better amp and let it sing.
If you don't have money right now, don't worry it will come and just read on here about certain brands, wiring and what not and you will have a very nice setup next time. Till then, rock on with your bad self!