I guess it's personal preference? I type about 5-10 wpm faster on my hhkb uniform 45 vs my variable realforce. I just prefer consistency over thinking whether I've actuated the key or not - since I type very lightly.
Definitely try to get them used instead of new. I'm going to sell off my varibale realforce and just keep my hhkb. Otherwise Can't justify almost a grand in keyboard holdings.
Although I have not tried the variable realforce, I'm not sure if it would be for me. Would you prefer your HHKB over a realforce if it were a uniform weight?
Also, I borrowed my friends cherry blue keyboard and have had a bit of time to play with it and get a feel for the keys. I enjoy the light feel of the keys however the clicking of the key bugs me. I also feel the tactile bump half way through the stroke of each key to be sort of... unnatural? I'm not the best at articulating my experiences with it however I found the distinct tactile bump to be unpleasant. As far as I'm aware, the browns are the same as the blues minus the 'click' sound upon actuation.
Perhaps the cherry reds would suit me best due to their light and linear touch. When looking at the force diagram's for topre keys, they still look like an attractive option.