Well, it didn't take me long to get my way over to trying out the Topre boards. I received Realforce 87U uniform 45g keyboard today, along with a Leopold FC660M. I was using a Ducky 9807K G2 Pro and a Das, both with MX blues, as my regular boards. I started playing with the Leo for a while seeing if I would like the clear switches. I wasn't really too pulled in. In fact, I wasn't really all that impressed with the Realforce board either. But, as I slowly used the board more and more, I started enjoying the presses more and more. After going for a run and coming back to the computer and finishing some code, I was completely sold on the Topre switches.
As another user mentioned previously, the Cherries now just feel rough and gritty when I press the down. I believe I'm completely converted to using Topre switches.
Interestingly, though, since I also received my FC660M today, I got a feel of the clears for the first time, and after playing with it for a while, it sounds like ergo clears would have a slightly similar feel to Topre switches. I've not tried lubing and swapping the springs, but it somehow seems like that might be the case. At least, the action of pressing the button down seems like it would be similar. I think the rebound of the key would not be.