I decided to go with the four cylinder because its so much more mechanically and electrically simpler than the P400 as well as much less money . I think its the sweet spot in the range - I got to drive one and was very satisfied with the power and liked that the four cylinder comes with lower gearing in the differentials which in theory will yield a performance benefit off road. The four has only one intercooler mounted in the front right corner as opposed to the two intercoolers in the six. The lack of the MHEV system is the main reason I chose the four - my first choice would have been a six cylinder non-MHEV diesel but that's not gonna happen. I own two other diesel Land Rovers - a 300 TDI 90 and an old SIIA 109 wagon as well as a 1967 SIIA 88 Petrol that I'm restoring.
This will be Land Rover #20 for me - I've had a Series 1, a bunch of Series IIA's about five Range Rover Classics, a Discovery 1, an LR3 and the TDV6 Discovery 5.
I've selected all of the off-road goodies that one would want on a Defender, lockers, 18" wheels with the "off road" tires, ATPC, front skid plate, tow package, raised air intake, fender flares with the small mudflaps, hood decal and roof rack (no stupid external lunch box). I did bling up the interior a bit with the upgraded seats, wood trim and sound system (full leather since I wasn't real impressed with the cloth/leather combination). I'm planning on adding rock sliders, winch (the factory winch mount is currently on backorder but I also want to see what ARB comes up with) and probably front and rear bumpers to replace the plastic. I'm expecting the aftermarket (especially the Australians and the Germans) to be all over this vehicle
I'm really looking forward to getting to know the new Defender. I'll report back on my impressions as we get some experience with the new truck.