Do you prefer it over a 300TDI/TD5?
Yes
For business users, is it possible to reclaim the VAT on the SW with panelled rear windows?
Ask your accountant.
Do the doors fit?
Better than previous models yes.
On the face of it a 110 SW is a lot of money for what it is, however, have you found the cost of running and changing newish ones for new ones camparitively acceptable? Presumably the answer is yes because you have done it, I guess I'm asking if running a 110 has made financial sense compared to say a Disco?
I took very little loss on the late TD5 I traded in so the additional I had to stump up for the new one was acceptable. Having owned and run several of both (110 /Disco) the 110 makes more sense for me and my needs at the moment. Depreciation is less on the Defender than the Discovery.