for £400 i would concider used 20/30D's.
what kind of pics are you wanting to take? to be honest i cant remember the last time i used my tripod, if youre not going to be taking low light and/or slow shutter speed shots id hold off for now.
but thats just me..
I want to get pictures of scenary, i wnt to get pictures of people, i want pictures of random and interesting things, i willw ant low light things, i want some graphic images e.g. a poor block of flats in a poor estate in Bradford, i can do some pretty cool things with these kinds of pictures, i want some pics of the sky, especially at night so ill be investing in a lens for that.
Some other things which i cant remember right now. I want to do all kinds of photography atm, until i find my fav type.
I will want to be going down to the local lake and getting some shots down there, and go for walks when bored, theres a wind farm not far from me which id love to take a visit to..