HI Dragon, as Dugite says all of these problems are known, but what you do get with the LR 6x6 is fantastic off road capability, the 6x6 will back up to the most unbelieveable places, just used one for a week on ATA and nothing comes close to the performance. Spend time and $ on sound proofing and insulation. It pays back in spades. Fuel economy @ 80 kph is king, 90 plus, - buy a refinery. There is no other platform to transport 2 tonnes of stores off road on the type of terrain the 6x6 can deliver IRT its spacial footprint and I have not found any other vehicle that comes close, having owned an OKA, Mog etc. Parts are out there, I bought what I considered the hard to get bits from the auctions, as did many other 6x6 owners, and parts are still coming up from time to time. Study the NSN numbers and you will be surprised at what is out there still. Warning though, the 6x6 does NOT, I say again, does NOT like sharp left/right hand turns and can break axles. Treat the steering box like it is not powered and generally speaking, they are pretty good. (Turn in the opposite direction before reversing etc and do not turn the steering wheel unless moving and other 'driving in general' directions as per LWP-G 4-3-1 Driver's Handbook.) The 6x6 turns in 1.43 QML (Queen Mary Lengths) more than a standard 4x4, but this is something you learn to live with and there is a bull bar fitted for misjudgement

. KLR is an excellent resourse and the guys there have worked on the 6x6 and really know their stuff. I have an F! as well, and find the fit between the LR 6x6, the LR 4x4 and AACO specific to what you want to do. All perform a different role and I agree, for recreational purposes, you have to choose the one with the most advantages/less disadvantages that work for you.
Welcome to the forum - I look forward to following your posts - STDDIVER