Best cameras for professional photography?

I love photography, and I already have a fujifilm semi-professional camera (I think it's about 6 megapixels), but yeah,, it's my birthday in a month and my mam and dad said I could get a professional one if I wanted since I'm really into that sorta thing...

and it'll go to good use

But yeah, what are good types to get? I've know cannon and nikon are good cameras but they're sooo expensive, and I feel bad if I ask for a camera that is like £300+, or would I have no choice if I want a really good quality camera?

Thanks

what kind of pictures do you like to take? cannons tend to have more built in photo options like B/W,color options,etc.. nikons are more reliable and tend to have limited to no built it photo editing, most of the photographers that I know of that do paying jobs have nikon D50's and D70's a few with cannon rebels and eos. me personaly im not a professional by any means and I have a D50, id say if your really into it and your parents support this id say go for a nikon D40 its still a DSLR its 6.1MPs and its pretty user friendly compared to other nikon DSLRs nice price and starter kit http://www.amazon.co.uk/Nikon-D40-Zoom-Nikkor-18-55mm-3-5-5-6G/dp/B000KIX65S if you have any more ? msg me id love to hear about what kinda pics you take and so on

Nikon D series 40,80,90, 200