I want to get some new pickups for my SX. I found the DiMarzio Ultra J's and the Seymour Duncan Classic Stack. Both are noiseless, which is a feature I would like to try. Is there a noticeable difference between these two? I see a lot of people that have the Ultra J's but I haven't seen anyone with the SD's. I play classic rock, but I can go anywhere from metal to funk. Your help is appreciated.