Interesting!!

Not got the camera yet

For ages been looking at
Canon 450D,500D,550D,60D
Nikon D40
Nikon D90
So you will see why I started this topic.
I'd hate to stand for days looking at the box without daring to open it.
Probably a Canon at the lower end.dunno.I suppose I'm wanting someone to decide for me.
oh...and what's this "noise" I keep reading about?
Cheers,everyone.Thanks for the informative and amusing replies.Feel free to keep them coming.
If you're wanting advice on which to buy, you've got a fair range to go at there (and a huge budget difference between a 450D and a 60D).
Do you want video? Do you want a big, heavy camera or a small, light one? Do you want multiple lenses (could be worth getting a cheaper camera and more lens options with your money).
How into photography are you? That sounds a daft question but if you're looking at 60D, you're talking about a grand's worth of budget (by the time there's a lens, cards, bags etc). Are you just looking for a new camera to take nice pictures with or are you looking at it becoming a serious obsession (and therefore a thousand quid will just be the start of a very expensive relationship with your bank / camera shop)?
If you're just dipping your toe in, a 450D is a great little camera (no video though). I started on that with just the kit lens and it served me well until I knew what I was doing. Once you get bitten though, it's an expensive road.
Given you're not sure, I'd head down to a local camera shop (if there's an independent one nearby, head there) and just talk to the guy behind the counter. Have a hold of the ones you're thinking of. The 50D and 60D are much bigger and heavier than a 450D or 500D. You may prefer the feel of one (my wife, for example, hates my 50D as it's too big for her hands - but loves my old 450D).
Not sure on the Nikon ones as I've not used them but they'll be as good as Canon. Again, have a hold, have a play with them in the shop. You might love the feel of them over Canon.
You can't really buy a bad camera from those manufacturers so it's the balance between budget and what it feels like when you play with it.
And when you get it, charge the battery then go for it (worth reading up about stuff like aperture, ISO & shutter speed beforehand though if you want to take decent pics from the off - it'll certainly be less confusing if you're totally new to it and you do a bit of reading first).