Hi Guys, new to all this Photography lark....

Need some help choosing a camera for my design agency

One thing the camera needs to do is produce images like below, thats why im buying one really for our website etc, but it would be nice to be able to take some great outdoor shots too.

Here's a mish mash of cameras I have bid or looked at on ebay - probably barking up wrong tree but need some advice! do i go DSLR (more ) or Bridge?

Olympus E-500 or E-400
Olympus SP-550
Fuji Finepix S6500
Fuji Finepix S9600
Panasonic Lumix FZ18 or FZ50
Canon PowerShot S3 IS
Canon PowerShot G7

anyone have any other advice or models that would suit our need???? I don't want to go overkill spending silly money etc just want best bang for my buck!!! not even bothered if its a 4-5 year old model etc