Folks,
The Brumby 600 is about the only LSA that has been flight tested (by a highly qualified and certification experienced test pilot) throughout the full flight envelope, to the standards of a Normal Cat. CASR/FAR 23, and then some.
This alone is a major recommendation.
Structurally, they beat most of the competition hands down, that is why their empty weight is a bit up on the competition, but "you can't have one without the other", as the old song goes.
The aircraft could be certified in Primary Cat. (much higher AUW) with the only structural change being some minor increases in sheet metal gauge.
Being of aluminium, any repairs are straight forward, unlike, say, carbon fibre.
You have choice of three engines (counting the different models of Rotax as one), I would probably go for the Rotax, or the new version of the Jab., with all the bugs eliminated ---- true, it exists.
The Lycoming option does not have much history behind it, to tell us what it is going to be like in service, and is heavy.
As for the modernised Aircruiser, forget it, a market does not exist -- just add up the new aircraft of similar performance sold last year,world wide, it is a very small number.
Tootle pip!!