I know this is an older thread, but as an update, I wanted to offer more data on my Realforce (Topre) and my Filco (Brown switches). How that I have used them both for a long time, I really prefer the Relforce (Topre) keyboard. It is a little bit smoother/lighter, and most specially, it is quieter than the Filco (Brown switches). Not only the Realforce (Topre) intrinsically quieter, but the Realforce (Topre) gets even more quiet the more I use it since I learned to hit the keys even softer, so there is less bottoming on they keys (they are lighter than the Filco). They are not cheap, but if I were to get a new keyboard, I would save money to buy another keyboard with the Topre switches
Will