Tom900 :
Looking at taking amazing photos and use for videos, we have a budget of around £500 is the 750d worth it?
The goo news is for video, canon has Green Lantern (look it up) firmware hacks which allow higher quality video to be captured and some of the recording limits to be removed. You could solve this down the road with an external recorder.
Anyways. In terms of photography, Bicycle Repair Man is correct. You need to figure out what you want to do. I shoot a lot of sports. I have a 300mm F/4, a 70-200mm F/2.8 and a 28mm F/1.8. The most sports specific lens of those is the 300mm, which I finally bought once I started doing a lot of that. Prior to it, I bought more versatile lenses.
More importantly, the camera won't make you...