Not an expert on everything here but if your looking for some budget boots that offer decent protection check out either the Alpinestar Tech 3 or the Fox Comp 5. Both are good entry level dirt boots and can get them in the aggressive tread if thats what your looking for. I've used both on separate occasions and found that the Fox are broken in easier but I feel they offer slightly less protection than the alpinestars and the buckles are not the best. I still use the Tech 3's as a backup pair and I know that they are incredibly popular for a cheaper boot.
Both pairs seem to be in stock at most dirtbike stores I go to. Go try them on and see what you think. Cycle gear is common and they have them in stock. Keep in mind that neither is waterproof.