I agree wholeheartedly with Greenwing. The D7000 would be my choice hands down over the D300s. Although both good cameras and an improvement over the D80, the sensor in the D7000 is much better, especially for low light and its ability to handle noise, together with its improved EV when compared to the D300s, which can make all the difference in recovering blown highlights or detail in shadows from RAW files. Since TJC will be using it mainly for macro and football on often dull days, being able to push the ISO up to achieve decent shutter speeds to avoid blur, without ruining the image with noise is an essential prerequisite.
I see no point in paying £100 more for an otherwise identical camera body with an inferior sensor, which at the end of the day, is the heart of the camera. 51 AF points really aren't going to be that more advantageous over 39 (most of us use spot focus anyway) and wont make that much difference in the real world. Ok, a magnesium alloy body is nice but drop either camera and you'll most likely knacker them both.
The following
link is DXOlabs comparison of all 3 camera bodies.
I currently own the D90. The only cameras I'd consider upgrading to at the moment would be the D7000, D700 or D3s. Short of a lotto win, the last two ain't happening any time soon lol.