Here's my 2 cents worth Southace.
Think about the time, money and effort bringing your current boat up to the level she is now - customised to just how you wanted it.
As you know, this can take years and heaps of $.
Doesn't matter what you changeover to, you'll still have things to modify, add, take off, etc.
Do you want to work on your boat or work with it (sail,cruise,etc)?
Don't forget if you go bigger, handling it (especially singlehanded) could be a whole new ballgame and maybe take the joy out of it.
I regularly go through these thoughts, but always come back to the same conclusion - what I've got now is right for me.
Anyway, life's short, so unless you really want a boat to work on rather than work in maybe stick with what you've got.
You could have therapy and learn to live with it - only cost a couple of hundred and you don't have to do anything....
regards,
allan