Yes, definately rather important. If I was happy with the host I was with, I'd pay a little more for extra resources rather than move to save those few extra $/month. But, if it worked out a lot cheaper somewhere else, I'd consider moving but then you have to start the entire host selection process again - I'll make sure this is part of my search if I ever have to move (I hope I don't - couldn't be happier with my host!)