Recommendations for a car stereo set-up?

I have a funny story that led me to find this thread. I took my 3 year on a 40 mile drive today to see Oneida Lake. " He said, daddy can you play some music in the car?" My 64 Dart Gt is a radio delete car, so I found an amplified hidden antenna on Amazon, a Nice Pioneer 50 watt per channel with all the bells and whistles including remote and ipod hook up model DEH1300mp, it is also the most popular at only $63.00. I think I will go for the Rockford Fosgate R1693 model, priced at $53.74 pair, to replace the Sparkomatics currently mounted under the package tray. I have been told that it is not necessary to cut openings for the speakers, and still get good sound, this will not alter my delete car's appearance. I am debating on using a universal bracket material with holes already in it, and bend the two 90 degree turns, or use a universal underdash mount. I want to keep it simple. I have it all in my Amazon cart and have not pulled the trigger yet.