You said that default proxies are slow.. if you get a VPS, you will have a 10Mbps or 100Mbps port.. much much higher than anything you could have at home.
VPS is cheaper and you don't need a dedicated server just for xrumer.
Do as Justone said. Use it without proxies. If they cancel your account, just get a new one.
what i am saying is y not use good proxy or vpn which will prevent getting shut down and at the same time xrumer will run faster with them?
It won't run faster, it will just keep you safe from getting your account cancelled (dedi).
If you have the money, that would be the best combo = dedi (or vps) + VPNs.