@MoMoney, did you end up replacing the caps on your KSF's? Yeah, I know it's been a while since I posted, just to say that I haven't regretted it in the least. So, just go ahead and follow Deang's advice.
Btw, I also replaced the stock diaphragms with the Bob Crites titanium ones. Easy as pie and also worth doing.
Had a pair of Elac floorstanders that I snaffled for under $100! However, after giving them a go for a week I find they are just too polite vs. KSF's. So those Elac's are just sitting in a corner, unplugged and unused, and I'm happy to listen to the Klipsches again.