Turbo Fire and other fitness DVD's

Hi all

I was just looking around online at the different DVD's to try and work out at home, because sometimes i get a little conscious of doing aerobic styled exercise in the gym, and usually go to use the machines for cardio.

I've heard a LOT about DVD's from BeachBody like TurboFire, P90X and Insanity, they look like great DVD's but as a rather poor student, I am not keen on spending £100+ on them, and wondered if any of you know any DVD's similar that seem to have a lot of high intense cardio and seem just as fun as they are, and importantly cheaper!! I do have all the Jillian michaels DVD's but would like to try something a lot different like TurboFire, which seems like heaps of fun,

Please let me know any like those, and if you tried them, what are the results like!