Aww she looks cute =) I love roached manes. If I felt like my horse could pull it off I'd do it in a snap!
I'd definitely leave the forelock though. I think it usually looks weird on horses when people take off the forelock..not usually as cute as it looked in Spirit =P
But what you can do if you're unhappy with her forelock is to get MTG for it. You really won't believe the difference you'll see. I have this horse I've owned for two years, an older guy at least 25..he had the wimpiest forelock I've ever seen and I figured that it would just be that way forever, but I just got MTG two months ago and decided to give it a light trim and start using MTG and the thing has already doubled in length and it looking so much fuller and healthier, it's amazing.
I'd definitely give that a shot.
Btw, love the roached mane on your Paint!