Go for it, Clive, but start by looking at the lenses you will want. Personally, I favour Nikon optics, but most of their lenses don't yet have image stabilisation, though they do a wonderful f2.8 AF 21-36mm equivalent, then a 36-105, also AF f2.8. The front element of the former is a brute, the lens weighs 33 oz!
There's also a good all-rounder 18-200 (27-300) f3.5-5.6, but the big brutes are great.
The big difference with DSLR is the number of choices you have to make in camera: image size/quality, white balance, ISO sensitivity (film speed). Plus a plethora of shooting options, eg AF point, metering type etc.