Yep, the right springs made a big difference for me too. I went with Racetech and also added Goldvalves. If you want more stiffness, SRC also makes a fork brace to firm up the front end but you will have to cut the front fender and lose the fork boots and replace them with either Sealsavers or SRC Mudskins.
Your other option is to replace the entire front end with the USD forks and wheel from a KX125/250. Do a search in the forum and you'll find out all the info.
I'm spending way too much time on here. Somebody make the rain stop...
Best,
Greg