I have to say I love aeros as well. I've only been a passenger on aeros trips (air cadets, UAS) and by far the best has been going with the Firebird team (courtesy of their sponsors). Did it twice with them - bloody fantastic, although the last time I was subjected to an outside turn and outside loop

. The Extra 300 is something else - you should try and blag a ride in one of those.
Need to get those hours up so that I can get a share in an aeros capable plane