I'm looking to replace all the speakers in the car with some less shoddy ones. the rockford fosgate punch ones seem to get good reviews but was wondering if they would struggle if the volume is cranked up. most other brands seem to be above 100w for similar price where RF is only 55w. I'm guessing they would sound better than most but start to distort at higher volumes?

and would it be worth hooking them up to an amp, as most HU's only do to 50w?