hey everyone, had a quick question. i have a sony cybershot compact digital cam but have recently been considering an upgrade to a dslr. ive been lurking on the forum reading up and it seems the nikon d50 is a solid choice for a beginner looking to take photography a bit more serious. can someone tell me what the limiting factors are to having a good point and shoot digi cam as opposed to a cheaper DSLR like the D50? thanks a bunch