They'll be an upgrade, YES
I think the rate will be ok for you and I think it's a good idea to put them on and check them out. Setting the preload, compression and rebound will give you a better idea if they are good enough as they are.
Some riding is better with linear springs, but not all. On an expert level it means a lot that the front and rear are in harmony, so if you don't intend to upgrade the rear to a linear spring it might be best to keep the front progressive.