First thing: There is no such thing as a specifically 'pro' camera, but pros do generally use top end DSLRs (from, say £3,000 plus extras) because they give excellent image quality and are rugged and reliable. There are no DSLRs on sale in Britain for £300, but they do start around £350. All brands on sale in Britain are good, the top three are generally considered to be Nikon, Canon, and Sony. Certainly any DSLR will give you a good start in serious (and fun) photography. Indeed any DSLR becomes more versatile when you buy further lenses for it. The other way to look at it is a 'bridge' camera - which have long zoom lenses and start around £180. The physically smaller sensors in bridge cameras mean that the ultimate quality of DSLRs is not quite there, but the quality may be plenty enough for you.