I've used a Panasonic DMC-TZ5 as the daily shooter I carry in my pocket at all times. I like it a lot, in fact, so much that I'm thinking of buying the logical successor to this model. I just want whatever improvements Panasonic has introduced in the past 3 years or so. My problem is that Panasonic has so many versions of the Lumix that I'm not sure which version to buy. DMC-ZS19, DMC-ZS20, or something else. I'm confused! Does anyone know the Panasonic product line well enough to give me a recommendation?

Thanks!