What next?

Hi, I've just finished my first round of insanity and I am trying to decide what to do next. I did think I would just do another round but I fancy a change. Any suggestions? I would still like to lose about 5lbs (vanity weight) and tone up especially the thighs and bingo wings. I am not a member of a gym. I do a lot of cycling and walking anyway but they don't work me in the same way. I can't really afford to buy something like T25 (which is about £100 in the UK). Would be interested in what people have found really challenging when they are pretty fit anyway.