Also would it be better to buy a brand new colormunki display or a used i1 display pro
I'm from the uk and have just got a Colormunki Display which is absolutely fantastic. I have had a quick go at Calibrating my 51D8000 plasma and the results are night and day, so easy with the Display and it's quick at reading.
Can't recommend it enough and from the UK as myself it's the best value option out there
Panasonic TH50PF50 Pro Plasma | Sony STR-DH810 Receiver | Tannoy HTS101 Speakers