[Ventruck]

lol I over-did my own Diamondback, but not to that extent.
Personally, I'd go for carbon handlebars instead of fork. You feel the difference a lot better. It's not as much of a hassle, can cost less if you hunt well enough. Explode? I've put my carbon riser through a bit of hell and nothing ever happened.

So what to do? I recommend keeping the DB as a commuter/beater. Get another bike to be serious on investment-wise. I understand you're in a position where the bike feels perfect, but you have to make a cieling/limit to when too much, is too much. What's gonna happen when you got the whole new gruppo on, and then the frame fails? Sure, you can buy a new frame...but it'd cost you more than an all-around new and better bike.