Sub / Amplifier Questions

[smittys69]

I am currently running (2) 5.25" Rockford Fosgate speakers up front and (2) 6" x 9" Rockford Fosgate speakers in the stock rear tray on my 69 camaro. I also have a Rockford Fosgate amp and Alpine deck. I am wanting to add a subwoofer to the trunk along with an amp. I'm looking for some recommendations as to how many subs to install and what amp to push it. This is not for competition - just good quality sound. I was thinking about (1) 10 or 12" sub placed in an enclosure facing the rear seat. I don't know what I need for an amp or the best place to buy - but I do want everything to work well together as well as look good together. Also, if anyone has any pics of a 69 with custom panels in the trunk, I would appreciate seeing them. Thanks in advance