I would audition some local subs and see what you like. Also, how big of a sub do you want (can you fit?) SVS subs hit hard for a good price - musically, I think there are better out there, but they do hit hard, no doubt about it. Check out Epik subs also..they have some good looking subs at good prices - the downside is they are quite large boxes, but I have yet to see or hear a bad review or a bad impression on them. I am not familiar with the Axiom subs, but for dollar to dollar, you certainly have a lot of good options out there to choose from