Ello toot.  I have a $15 mouse from Meijer with no extra buttons, so I don't know what's out there.   

I just played Cherry_Bloss0m (aka misssubtleties) this afternoon in the greed server.  Anyone think he/she's a girl? Look at the names.  If he/she's a  girl...wtf???  Girls aren't suppose to be good at this stuff.  Hacks.