USB cable is cheapest option for connecting - I use a mini gigabit switch and RJ45 cable, but then I'm awkward.
PCMover (£30 at Amazon including cable) is fine but expensive as a one-off - I read a review a few months ago and it is a one-off, they said that you cannot use a second time.
Email - if Outlook the just copy .PST file(s) over.
I personally would copy all the data to a removable drive and install software as and when needed.