If it's got a heater and/or you're not doing aerobatics don't bother with overalls. The RAF blue/grey leather jackets are very good - velcro/zip-up pockets and a pen pocket on the arm (which I've never used), high quality leather but about £320 I think. Mind you that ensures there aren't too many about. Warm enough for a walkround on a chilly day but to be honest I just use a fleece and chuck it in the back when I get in. Jeans and a jumper sounds about right.