Milpai,
The TC-P60VT60 is a great choice for your next tv. I've been enjoying a VT60 for about 6 weeks now and I think you're going to love it. I've owned some good tvs over the years, 3 top of line crt,rptv and lcd Sonys, and have never been more pleased than I am with this Panasonic plasma. Picture quality, colors. contrasts are stunningly good/great.
Wish I could help you about using your i1Display Pro to calibrate it with but I'm not familiar with it. There are some great forum threads on www.avsforum.com concerning Panasonic VT60 pricing, break-in and calibration you may want to read.
I didn't have mine professionally calibrated or use any custom calibration software. I've just been using the built-in 'THX-Cinema' picture mode that looks great for day and night time viewing. There are other built-in picture modes you could choose such as 'Vivid', 'THX-Bright', 'Standard' and 'Cinema' but 'THX-Cinema' looks significantly better to me.
Enjoy your new plasma and please report back on impressions after you've viewed for awhile.
Tim