well, I just got the 28" Sony Wega without the dolby surround sound. It works well and looks nice.
I didn't go for 100Hz, as I'm not totally convinced, the 100hz do look good next to a 50hz model, it has a much more stable image and no flicker of course, but I do feel it makes everything look a bit artificial and overly colourful.
Best to go see for youself though. I think either performs very well.
I decided to get the cheaper 50Hz KV28FX20 model, and get a DVD rather than spend more on 100hz and not be able to afford the DVD player.
Panasonics also are excellent TV's. get the 'Tau' models rather than the cheaper non super flat tube versions if you can affford one. TX32PK3 (I think) is the model number for the 32" 50hz model.
Panasonic are to release several new widescreens soon, with OnDigital AND Sky digital inbuilt together!... so they might be worth a look when they arrive ....