I have a curvey also, and recognise exactly what you describe. As Bib says, you need springs.
I'm 12st and use 0.85 linear springs from
http://www.ktechsuspension.com/
I'd say for you the 0.9 would be just right.
I'd also definitely recommend Fuchs/Silkolene "Maintain" RSF oil, it has good technical specs. Personally I found the RSF 7.5W works quite well with the stock fork internals, it is actually more comparable to most other 10W oils (see table here
http://www.peterverdone.com/archive/lowspeed.htm showing actual viscosities ). You may find it a touch soft with those springs on rebound, but I'd suggest it as a start before going to the 10W version. If you still have the original oil in there it will be like grey dishwater now.