Of these choices, I would say you will probably see the most benefit out of a regear and a rear locker. A locker really does make a big difference. Your EVO leveling kit paired with 35s will be plenty capable for most things you will do on 35s. I would also suggest gusseting the C's on your front axle. Cheap insurance and can help you avoid a common issue with the end forgings. I would personally wait to do coilovers until you can afford to replace that front axle. Those coilovers will get you driving much faster and that's when you'll really start breaking shit. Good looking rig, it's coming along nicely!