Ok, so I'm looking into building a new computer but I do production on both laptop and soon to be desktop. I want a soundcard for both of them. Something I can switch back and forth. So I have two questions. One, Are external sound cards slower than ones in a computer case? Are there any disadvantages to having an external? and two, What card should i get then. I already have a good surround sound speaker set that can take digital cords.