Computer specs needed to boss

I would expect any new computer to run Maplestory fine. However, two things will halt this:

1. Your internet connection is a huge factor. You could run a 50 GHz Processor*, but it won't mean crap if you have a 1 MB DL rate on your internet.
   
2. Your OS is a second factor. I keep hearing about Win7/Vista issues, so you'll have to circumvent those to boss without problems.
   

*Unholy amounts of processing power there, since a 3.0 is high end atm.