I understand the financial considerations, ... but! I think you will later regret getting rid of that very nice model 60! I have one just like it, and I know I would. I owned a Model 36 first (a long time first!). I coveted the Model 60 when it was released. Never could find one and couldn't have afforded it if I had, although I likely would have put up one of my children as collateral to buy it on the credit if someone would have made that arrangement! In later years, I found my copy of your gun and bought it. Prior to this time, I grudgingly traded my Model 36 for another revolver I thought I wanted more than it. Actually, I did want it more, but I never got over the loss of the 36. Yes, I replaced it at a later date, but it's not the one I had and it did not ride with me during the time I owned the first. I'm proud of the replacement, but every time I look at it, I think of the first one!
If you can manage to buy the Model 36 in any manner that does not seriously compromise your relationship with your wife, I think you ought to do so. I don't think you will ever regret it. But that's just me talking, and you and I are maybe different. I don't know how you feel about your Model 60, or what it's history with you is. If you have any feeling at all about it other than it just being another revolver, try to keep it.
On the other hand, if you can only have one, then by all means get the one you like the best. Just be as sure as you can about the one you like best!!!! Good luck with your decision.