The only problem with that is that you aren't them, so what they say could be completely different from what you experience if you buy their setup. Generally if you really don't want coilovers then people go with AGX and S-Tech. Or AGX and RSR. Or AGX and Whiteline. It's pretty much whatever you want. You can look in the archive/faq section to look at spring rates for a lot of different springs. Also try different forums.
http://www.freshalloy.com/ is a good source. Most of them would say coils too though.