Gosh I feel like I want to try the 20%.Looks great! 35% is spot on in my opinion. You've very lucky that you can tint all the windows in IL, in BC we have to leave the front ones clear (or be hassled by cops and eventually fined).
Ouch, now that is harsh :|unfortunately that depends on the laws in your state. in CA, you must have 70% VLT or more in the front windows, and can do whatever you want in the rear.