Ben,
I did get the 495, but via Ian rather than Jabiru. Clear Prop kindly mailed it to Jabiru and they installed it. I have had other Garmin GPSs, so the familiarity of the interface was a bonus. The screen is good, the database pretty good, and it seems as bug-free as the other Garmins I've owned. The only annoyance is the panel mount, which I think is a bit fiddly to insert and extract the GPS from.
I went for steam guages (ie traditional analog) instruments in the panel. I considered putting in the engine management option, however other local pilots have experienced long turn-arounds when glass cockpit units have failed - so I decided to keep it simple. The only change I had made to the standard panel was to put in an ICOM radio, with a slot below it for a matching transponder - when I get around to putting one in. (I think the standard units supplied by Jabiru are good, and I've heard the service is excellent, however the ICOMs have larger, clearer displays which I prefer.) Other options I took up were a keyed ignition and tail strobe.
So far I'm very happy with the purchase - I think it's about right for me with my training history and (low) level of experience. A big plus is the presence of some experienced pilots with similar Jabirus in the area that I can go to for advice. I've had no real problems with the plane so far, only that she has a foible of flying about half a ball out to the right (which comes with the territory, I'm told). That may become a bit of an annoyance on longer flights, so I'll have to get around to sorting it out one day.
I found there were some thoughtful, helpful discussions in these fora when I was trying to make up my mind about buying a Jabiru, and deciding between the models. In particular, MozartMerv has described his experience with the shorter-winged 160 during summer, while others have commented on the 170s propensity for excessive float on landing. (I reckon Donkey is correct about how to handle the latter, but if you're going to do a lot of short-field work then you should look into this further.) Another piece of advice was to treat the nose wheel like it's made out of glass ie keep the weight off it on takeoff and landing as much as possible - it helps no end with the steering.
Cheers,
K