Hmmm... tough call. I was looking at a Dolce... ended up with Ruby Comp. i love my bike. I get warm fuzzies when I think of it.

if your Dolce is a good fit, then I don't see a huge reason to upgrade. I am too lazy to compare the geometry between the two to know if they are different.

I don't know that you will feel the difference between Tiagra versus Ultegra (for example). Has anything dramatic happened to your Dolce (crashes, crummy weather, etc)?

My bike with everything attached, is 20lbs. When I carry more (laptop, work clothing), I just consider it 'more calorie burn' and good training.

Anyway... I am leaning towards 'don't upgrade' ... unless you want to give yourself a big gift and you can easily sell your Dolce.