Hey Guys, I'm new to working on cars and I 've been wanting to mess around with my 05 Sunfire. I've been wanting to upgrading the sound system for awhile now and I wanting some opinions. I went by an audio store in town and the salesperson was more a less saying I needed an amplifer and putting a lot of doubt it my head about upgrading them and just being vague about everything I asked. I know the fronts are 4x6 and the rears are 6x9. I was thinking about picking up a set of pioneer speakers and a deck. I'm not looking for something thats going to be mind blowing, I just want a solid upgrade over my stock speakers. Any thoughts? Do pioneer make good speakers? Also, how difficult is it to replace the deck? Thanks!