I have an '02 XRL, and need to upgrade the suspension, as I am 6'4" and 265 lbs., the stock ride is a little soft. I ride 60/40 dirt/street. I know I need heavier springs, but am unsure about the shim stack and valving. I understand that the stock valve can be drilled out to more or less allow finer tuning with the stack, and the stack manipulated, but that adds a little extra work. I am wondering if anyone can tell me the ride quality difference (for general/aggressive trail riding) with just upgrading the springs, to upgrading the springs AND valving. Obviously, I would rather just throw some heavier springs in it and hit the trails, but if it can make a considerable difference while I have it apart to go the extra mile and valve it..... Thanks in advance.