FZ30 vs Pro815

[laxer3n7]

I have been looking for a high end digital camera for a month or so now and have narrowed it down to the samsung Pro815 and the panasonic FZ30 based on some user reviews. I like how the Samsung can go all the way down to 28mm on its lens because i am going to be taking a lot of architectual shots. One of my questions is if i can get other wide-angle converters for the panasonic as the panasonic ones are quite expensive. Also if i am taking shots in a museum will i have to take pics in higer ISO settings.

Bryce