Best thing I ever did for my curvy was fit new linear springs. The stock springs were too soft even for my 12st. I fitted 0.85kg/mm (8.5N/mm) from
http://www.ktechsuspension.com/
They are very helpful, worth a phone call. They even offered to exchange them for a different rate if I didn't like them. Not cheap at around £80 odd (a few years ago) but excellent value for money mod, stops the sogginess.
I'd second the recommendation for Fuchs/Silkolene RSF fork oil (now called "Maintain" RSF, used to be called PRO RSF). Personally I use their 7.5W which according to the table here
http://www.peterverdone.com/archive/lowspeed.htm is very comparable to most 10W oils (35cSt). With the right springs you don't need to try to fudge the system by putting thicker oil in (which doesn't fix the real problem anyway, which is the soft springs).
Emulators are a nice mod, but frankly you'll get most of the advantage simply by getting the appropriate springs with some fresh oil. Tuning the emulator discs and valve spring rate/preload is another set of questions altogether.