Thanks for all the interesting opinion and good recommendations.
I am in no hurry to make a purchase because moving to large format is almost a change in lifestyle. To do it right would mean building a dedicated darkroom and getting a 4x5 enlarger and dip-n-dunk processing equipment. I only started exploring medium format 3 years ago and still haven't become familiar with all my lenses. My darkbag and bathroom setup is perfectly satisfactory for that.
It's probably just GAS.