I am going through the same decision. We usually travel with 2 cameras. A Canon XSi DSLR & my trusty Panasonic LX2. My wife can't get the hang of an LCD so she shoots with the Canon. But . . . it stays on Auto 95% of the time
& we never use extra lens. I carry the LX2 in a small belt case so it is always attached to me. And guess which one gets used more often? Our picture count after a holiday is usually 3:1 for the LX2. So for us, the convenience of a small camera is unquestionable.
I thought a halfway option might work, so we ordered a mirrorless Sony NEX-3F 2 weeks ago after seeing some of the pictures from the Room Monkey's holiday in Europe last month. But it hasn't come out of the box & it is being returned because it is just too big. Lugging a case around - esp at night in restaurants etc - just isn't feasible. The Sony RX-100 looks like the best option for us.
Analyse your needs & how you will use the camera to help with your decision.
Ian