Well I have owned 2 gr 582 think they are great have flown mine from top of qld down south as far as lismore the second plane has auto lube system Witch I swear by ,make flying much easer then worrying about mixing oil mine climbs @ around 1000 ft and cruise @ 70kn with a fuel burn @ 18 lph
But I have a friend who has a ga 55 with a 100 hp rotax it flys great cruise @ 85 and burns about the same as my two stroke
Enother friend major Millard has a gr 912 he gose everywhere in his so I shore he tell ya about his when he reads this tread
But for my point of view I love the little two strokes But I think it come down to what u wish to do with ya craft mine dose a lot of local flights in and out off short strips and then may be once or twice a year I do a long distance trip witch is a little slower then the four bangers but still as much a adventure to do with both ..