OK, if your own ISP told you to search for their own DNS servers on google, thats not really good. He should be able to determine the best DNS server and closest one to you.
Im using Windows Vista Beta 1 right now on a 3.2 Ghz with HT and 512 megs of ram and a 128 meg DDR Radeon X300 Card and it is working nice and smooth... so far.