Wilwood drum spindle disc

are the wildwood 4 piston calipers worth the extra $300 dollars over a factory 73+ disc swap, this will be used as a street strip setup. Currently has 9inch drums, so I at least want to upgrade to the 10" spindles in the process. I live in the mountains and want something that will last and be safe in this case also, but not go overboard as I could use the money other places also.