I don't know anything personaly about the speakers, but if I were to redo my sound system, I would get some alpine speakers.
www.sonicelectronix.com is a great bargin site.
My experiance with my pioneer amp has been pretty good.
The amp- From everything I have ever read, soundstorm is a piece of junk.
I have a sony HU and infity 6X8's. My head unit is supposed to do 22w rms, and it sounds pretty good. It sure gets loud enough and clear enough to shake the door panels. You can feel the base throughout the entire panel.
Bottom line: Get some nice quality speakers and you won't *need* an amp. Buy speakers with the potential to take much more power and you can upgrade to an amp later if you want