Hello amipal,
Welcome to the forums and please feel free to post any photography related questions you have within the appropriate thread on here.
Now, are you looking to purchase a DSLR camera or are you thinking more of what is termed as a 'Bridge' camera? The major differences between them are:
- A DSLR camera has interchangeable lenses where as a Bridge camera has one lens
A Bridge camera has a larger sensor than a compact but is still a much smaller sensor than a DSLR would have
A DSLR has an optical viewfinder, where as a Bridge camera has an electronic viewfinder i.e. the image you see through a bridge camera's viewfinder is a small jpeg produced by what the sensor is seeing
If you like your Panasonic Lumix cameras then you have a choice between the FZ28 or FZ38 Bridge cameras or the GF1 or GHF1 Micro Four-Thirds DSLRs. All are fine cameras, but with the last two you can purchase different focal length lenses for them if you want to take landscape shots, do some close-up or macro photography or a telephoto lens for some sports or wildlife shots for instance. With a bridge camera you have to make do with the lens that is built into it. It will be a variable focal length lens that will probably be from a focal length of around 28mm at the wide end to possibly as much as 550mm at the telephoto end. These are often described as a so many x zoom lens, i.e. if the lens went from 28mm - 280mm then it's a 10x zoom. If it's a 28mm - 560mm then it would be a 20x zoom lens etc.
When choosing between these fine cameras the one thing you really have to pay closest attention to is what you are going to be photographing. If you want to travel light buy a Bridge camera. If you don't mind lugging round some extra equipment with your camera then buy a DSLR, as with this type of camera you will probably add more lenses, filters, flashguns and a tripod as time goes on to achieve the images you want.
I hope that has given you a little more incite, but I must reiterate that you must buy the camera that best suits your needs, so decide what those needs are and you should have your answer.
Best of luck.