You actually sound quite happy with your current options, and based on your usage, I'm not sure you will find something better for your purposes. Of course, it's always fun to try new things, and on that note I'd avoid the pok3r with clears, since that's a known quantity to you.
Greens feel like a stiffer blue, quite literally, but if you've never tried a clicky cherry mx switch, you won't have a frame of reference. The mechanism is slightly different to allow for the click, and it requires releasing the key slightly to a certain point before it can actuate again... this is something the tactile and linear switches don't require. I find it's not that big a deal if you are used to tactiles, but it can be jarring to those that use or prefer linears. As already mentioned, there is of course the noise too. There's a good chance you would like the MX Greens, I think.
If you got a 45G 87U, I'm fairly certain you would dislike it. The tactility is quite subtle compared to the HHKB, as is the sound it produces. Since you find you dislike cherry mx brown now, 55G would probably be more suited for you.
If you'd be interested in making your own board, or even just desoldering old switches and soldering in some new ones, you can consider the Zeal's current GB for R2 Zealios. 67G or 78G may be interesting tactile options for you, based on your preferences.