I have a Linhof Technikardan 45, and it is one of the best tech cameras ever made, IMO; it's such a unique design, and has every movement possible.
It is self-contained, doesn't need any extra accessories (other than a bag bellows for very wide lenses), no additional rails to carry, and lens boards are cheap and ubiquitous.
It would be hard to go wrong with one of these, and hard to find a more user-friendly 4x5 camera.
Like anything else so wonderful and unique, it does have its detractors, so read up on it as much as you can.
If I had $$ to spare, I'd also get a Toyo VX125, which is roughly the same idea as the TK45 in terms of portability and features, but uses a clever rail system, and has some geared movements (TK45 does not).
In the field category, Wista has an impressive line-up of technical cameras: the RF, VX and SP.
While not unlimited, movements on those cameras are quite generous, and they are very solid pieces of kit.