This is my first post here and I'm afraid its requesting info rather than offering . . .all advice I've already read on these boards greatly appreciated.

I am looking to buy a Landrover 110 and kitt it out for an African overland trip. Entertaining as that Landy/Toymotor debate is I am only looking at diesel Landrovers - lets just say for historys sake.
Has anyone any opinions/advice about what I've currently narrowed my options to? - that is:

1. early 90's Tdi defender, ex BT or Local Authority or suchlike - from a dealer with about 100,000 miles on the clock - top of vehicle budget at around £6000

2. ex-MOD mid to late 80's 2.5 N/A diesel- a few around with 60,000 plus miles on clock - around the £4000 mark for a tidyish one.

3. buy privately - has downside of not knowing when right vehicle is going to come up, and being based in London lots of trips around country viewing . . .

I am swinging toward option one - and spending £6000 on a vehicle thats done over 100,000 miles - is this foolish?

As the last Landie I drove was a series II (and that was about 10 years ago!) - are there any specific faults I should look out for in 110/defenders?

I realise this would sit better on a Landrover forum but I'm not aware of any good ones....?

Thanks for any advice.

Huey