You could try lift springs, but they change the angle of the CV's also. Springs and lift kit are the only 2 ways that I know of.
My '01 450ES has had a 2" High Lifter lift on it since probably 2002. I've never replaced a CV boot. I keep them sprayed down with silicone spray before and after I ride. And yes, if you are planning on running 28's you'll need the lift kit.
Outlawedrecon, looking at your pic, the front of the rear tires are rubbing on your flares... SO yes, they will rub. Maybe not so bad that you can't ride the bike, but they will rub when you get it into different situations...i run my 29"S with 2" lift lift springs an d 1 " spring spacers and i havnt had a cv problem yet but i gotta call b.s. because i ran 29"s with no lift at all and they never rubbed, pic below is with no lift