Rear coilovers 1303

[Hinken]

Hey folks

Doing a bit of modification on my 1303S, and I want coilovers on the rear.
The car will mostly be used on the streets, but I hope to get some runs each year on tracks.

I have been searching some forums but I get confused.. Im going to mount a kafer 5 bar brace, I will not have the torsionbars.
Im simply looking for some coilovers that allows me to adjust the height and if possible stiffness. (Or do I just change the springs for other stiffness?)

What are my options? Would be best for me to buy in europe, because I live in Sweden.

Im also interested in coilovers for the front, I want to be able to adjust the height etc on those too.

If you know about some threads that I should read, please link them!

Please help me out