I'm going to dump my ancient Aggressor soon and have been looking at these two setups. I'll be on fairly light trails maybe 3 to 4 times per week. Are the discs on the 4300 good enough for light trail duty or am I better off spending a couple of extra bucks, dumping the discs, and getting the 4500 for the better components? What should I expect to pay for either of these setups? I haven't done any wheeling and dealing yet, just called a few local shops and the going rate for the 4300 disc is $420. Fair price? Thanks in advance for the suggestions.