Olympus is indeed very good (3030 and 3040 series should now be in your price-range I assume)
Nikon is mostly cheaper and provides more or less the same quality.
I have them both and the Nikon looks like a “copy” of the Olympus, only different color and case. But handling, preview screen and menu work exactly the same.
Like you said, you want to print the images, so you’ll need the highest possible resolution in your price range.
3.3Megapixel is a minimum; below 3.3 you will still be able to print “regular” photo-sized pictures (13cmx9cm, maybe even 15cmx10cm), but since you want “large” pictures, I would advice 4Megapixel or more.
Â£400 is about 600EURO? I’m not sure, but I think the cheapest 4Mexapixels are in that range.
Also keep in mind: if you want to make pictures in 4Mexapixel, you won’t be able to store many pictures on a 16MB-flashcard. So look for a camera that has standard at least 64MB of memory.
Like Tax already said, it’s cheaper if you buy a standard camera and a good scanner. Classic photography offers a much higher resolution (about 10Megapixel). But off course, digital photography is easier and has no “extra costs” (developping, films,…) And you can’t erase pictures that don’t look good with a classic camera.
On a holiday, I always use digital camera’s because it’s easier to carry around.
But if the pictures have to look really good (e.g. wedding pictures, nature,…), I would still use a classic one.