You've hit most of the things I've hit on my 1996 with 200k on it that I picked up from the service manager at my Volvo dealer last year. Your car if it is high mileage may have some more things but you definitely hit the most common. And since you did them under your warranty it didn't cost you a dime, so I would drive it another 20k and see how it goes. You will of course have regular maintenance like timing belt and tune up parts, but I think you have a great car right now and I would stick with it and see if it hits you with another expensive repair. If it does and it pisses you off enough, then dump it for some other good reliable car. Speaking of reliability, the S60 has been far more reliable than the 850/S70 series. Just look at consumer reports. I keep my car because I love the way it drives and feels and how safe it is. Just a matter of what you want from your car and what your budget is. Every car has its faults. Good luck and maybe you could do a few things yourself from now on to save. Like the calipers. That's a simple repair.
Marty