Hello everyone. I am very new to car audio. About a month ago I tried my hand in making a custom box for 2 12" Kenwood subs. They aren't anything special. It was a budget project just to learn and to get started. I now want to continue to get more into car audio in the near future, but don't really know where to go. I'm thinking that I want to upgrade the subs now. My budget will be around $200 for subs and amp, give or take $50 depending on quality/recommendations. I just really have no idea what to look for though. What would be best for me? I have a 2003 GMC Yukon with the Bose sound system in it. Also, I am currently using a LOC (line out converter) to get sound from high level to low level(from what I understand) and was wondering if it would be worth it to just get an aftermarket head unit. Would be nice if someone could recommend me a nice head unit, preferably a double din seeing as the space in the Yukon is double din. I would be looking in the $50-100 range which would cut my sub budget back to about $200 no more. Thank you to everyone in advance for any and all help. Hope that you guys can help me!