Which subwoofer is best?

Alright so my buddy gave me 2 15" pyramid hyper pro subs. I know everyone says these are garbage but I'm not looking for it to he super loud. Basically I want some bass in my car because my speakers are too small to put out loud, deep bass. So would these be ok for that? One of my other friends is trying to sell me one 12" Infinity sub and my other friend is trying to sell me 2 10" Alpines that are like 8 Years old. Which one should i get for some extra bass? And yeas I know if I wanted some serious bump I'd get 2 12" alpine type R but that's not the sound I'm looking fot