Need help choose processor amd64 hardware for running 8-10 debian squeeze guests on a squeeze KVM host

[Siju George <sgeorge.ml@gmail.com>]

Hi,

I am seeking to purchase an amd64 machines for running guest vms under KVM.
There will be 8-10 guests with the following software and services running.

guest 1 - nginx and apache, nginx as reverse proxy to apache.
guest 2 - varnish cache
guest 3 - mysql masterdb
guest 4 - mysql replication slavedb
guest 5 - trac, git, apache php-maven
guest 6 - agilo hudson.

other guests will have similar configurations.

Could some body tell me what I should look for when I purchase the
amd64 hardware.
Things lke L@ cache and stuff I mean.
Which are th hardware tried and tested as best for running KVM?

Thanks :-)

--Siju