[Medic650]

I want to build a 300 Whisper bolt gun. Originally I was going to go with a Remington 700 but am concerned with the ejection problems with the Remington.
I've never shot a Savage but have they seem to have a good rep. and always heard good things about the accu-trigger. It looks like it's easy to swap the barrel on the Savage. Anything special to so for headspace? Any extraction or feeding problems like the Remington.
I don't know anyone with the CZ but, I like the Mauser type bolt on the CZ. It looks like the CZ shouldn't have any feeding or extraction problems. In a CZ I would look at the 527.

For the more experianced, which would make the best build?