Always difficult to say what should be Other's choice...
I'd say that you should keep your RM005, as the watch is dicontinued, and if you regret it, it will be, not impossible, but difficult to get another one...
The Breguet Marine Chrono is a very nice watch, the APP RO Chrono too, but the RM 005, is, for me, comapred to these 2 other models, the watch to keep.
Why?
Because you just said that even if you had some troubles with it, youstill like the watch...That means that you're really in love with, and that even 2 beautiful watches as the RO Chrono or the Breguet Chrono won't make you forget the RM....
Kepp, it, I think.
I think you like its originality, its " exuberance" , its well finished movement, and this special shape of the case...
So if you sell it, I guess you would regret it, badly.
My 2 cents.
Nicolas