Nobody asked for my opinion (and probably shouldn't) but is the $800 AUD in your pocket, assuming you get a replacement for $4K REALLY worth it?
You've got a bike now that suits your riding, has some versatility for off highway if the mood strikes, is in good condition after you fixed the brake issue and purchased a stock exhaust can, has the accessories applied that make your experience more enjoyable and most importantly (for me) FITS you. Some of your other options have higher pegs and lower bars. Do those work for you and your "experienced" knees & back, not to mention shoulders and neck?
I'm all for getting new/different bikes as often as possible, but I've also fumbled a couple times by ignoring the positives of what I already have and ended up missing those attributes after the bike was gone.
Just my thoughts.
You've got a bike now that suits your riding, has some versatility for off highway if the mood strikes, is in good condition after you fixed the brake issue and purchased a stock exhaust can, has the accessories applied that make your experience more enjoyable and most importantly (for me) FITS you. Some of your other options have higher pegs and lower bars. Do those work for you and your "experienced" knees & back, not to mention shoulders and neck?
I'm all for getting new/different bikes as often as possible, but I've also fumbled a couple times by ignoring the positives of what I already have and ended up missing those attributes after the bike was gone.
Just my thoughts.