jimski53 :
970s or a r9 295x2 i know the gtx is newer and comes with dsr and that but the sli config might not run as smooth as the 295x2, its still 2 chips but being on same board may help over sli set up. i dont really want any issues that come with multi card set ups
it shouldn't make a difference 2 chips on 1 pcb or 2 chips separated by a bridge. Unless there is something wrong with your bus.
From my experience sli or crossfire you will have trouble with some games, and be flawless with others but usually as long as you keep it to 2 cards you should be good...any more and your adding more complications and imo isn't always worth it (mostly for benchmarkers or heavy enthusiasts).
I'd say grab 1 970 GTX and then add another if you still don't like the performance. If you buy a dual GPU card you are forcing yourself to buy 2 cards (you can still use 1 gpu if you chose
😛).
Edit: Also the 295x just like the Titan Z are very overpriced compared to buying 2 invidiual cards that may yield better performance do to better cooling.