i cant in good conscience recommend buying a 980 now, specially only for 1080p 60hz
even if you did get it now and resold it later you would prob get a huge loss on it because of the 1080/1070
either you get a cheap card now, used or retail,
in a lower end model like 950, or an r9 380x/gtx960 and endure the quality for now until your true purchase
or you get a 970, and keep for a good while until gtx1080 have settled comfortably on teh market so prices are reasonable
but in noway do i think a 980 would be worth it, unless you could get it much much cheaper than 400 euros, since you can get a new 970 for 300€, much better price/performance specially at 1080p