If I am running 1m clicks/day and have all my LPs hosted on Rackspace CDN.
Is a Beyondhosting VPS enough for a CPVlab install to run at fast speed?
What are the specs of the VPS?
Most VPS can handle 1 million clicks a day just fine if they are tuned right.
I mean, it's only 12 clicks a second.
Using BeyondHosting is a good bet since they a) have good 'dedicated cloud' hardware that's particularly good for tracking systems and b) provide managed hosting. If you have to ask if your VPS will be fast enough, you probably want managed hosting.