Is it worth keeping my X5?

[camp freddie]

I've got a 2008 3.0d X5 which has done 93000 miles. I've had it for a few years now and it's never gone without anything but it's starting to develop a number of issues:
1. EGR value and pressure sensor need replacing
2. Turbo is whining at low speeds - possibly needs replacing?
3. Lower control arms need replacing.
4. Comfort seat base has too much play and needs replacing.
5. Transmission fluid needs changing.
6. Oil sensor needs replacing

I also hear rumours the DPF can need replacing around 100k too.

Do I spend the £3-5k resolving the issues and look to run it for another few years or put that money towards buying a new X5?

Ideally I'd like to fix it and keep it but I don't want throw good money after bad keeping it on the road.

What do you guys think?