If you were to design a tone arm, what would it look like and feature?

There are a good number of different tonearm designs currently on the market. Some feature a uni-pivot, some gimbal bearings, some are air bearing designs, others use a knife edge...etc. We also have multi adjustability ( SRA, Azimuth weight, etc) and size--9 inch 10inch..twelve inch. Then we have the SAT tonearms that also feature carbon fibre etc., 
If money was no real object, what is your idea of the 'ideal tonearm' that you would design...and why?