receiver & v-box - HELP Please


Please can someone kindly help. I want to buy a linux receiver, twin tuner, HD, etc, for CS. I have a motorised dish with 36v motor. I'm told I need a v-box.
Problem is, some say that everytime I want to change satellites I'd need to use the v-box remote, and then choose channel via the receiver remote.
Others say that if I buy a Mk3 v-box, I would be able to change satellites via the receiver, as long as v-box is connected correctly.
Can anyone please confirm which is correct.
Thank you,