I only really want it for Elite for now but can't justify £900-£1000 for a VR headset when the rift is easily £300 on eBay.
A DK2 might only work for 6-9 months, as it's officially 'unsupported' by Oculus now ( even though it runs CV1 games, etc... just fine ) and it's rumoured they'll stop supporting it entirely at the end of this year.
If you don't want to pay the £530 for a Rift CV1, plus say another £100-£200 for the Touch controllers when they're released, then your best bet might be Razer's OSVR headset.
It's £270 iirc and it does work with Elite & SteamVR, although there are a few issues.
Atm it's even more of a dev kit than the DK2 was/is, so could require a lot of tinkering to set it up.
Best bet is to read the OSVR Reddit & go through the Elite Dangerous threads already there to get an idea of the current situation.