Another update: i saw a brand new Mamiya RB 65mm lens on ebay, stated as last one, and they reduced the price a bit, so even it was expensive i couldn't hold myself and pulled a trigger on that lens with some another items, yesterday or before yesterday [Saturday] when i used my 90mm for first time inside the house [interior] i still love wider lenses, i have 50mm RZ one, so wanted to have different FL so i can use that on RZ too if i want.

Now i feel i want to buy 1 or 2 last lenses and not sure what to get, a macro lens? TS? ... something else?