I'm looking into the xxr wheels despite all the negative feedback. I've seen more complaints with the less spoked rims, however the 521's do not have that problem. And it's not like I'm drifting around town all the time to break them, as you mazda friends know lol. I just don't want my fenders all messed up. Its not yet but depending how the wheels look with the 17" I'll most likely still need to slam it a little bit too. I'd appreciate any advice or opinions, thanks!