need calibration advice

[Kirk Out]

i have a panny 50 85u that ive had lil over a year and was wondering if i should get a isf calibration, i already went around the forums and looked at different settings bought the dve disc, i was planning on buying a g20 but i think ill put the money towards a pro cal.. what kind of results could i see on the 85u if any iam going to call buschhometheater so i wanted to get any input from fellow panny owners or someone that has had their plasma isf calibrated.......what to do