I'd like to have both

... but if I absolutely knew that let's say Yakupov and Murray were both going to be super-elite players and each win themselves multiple Richard/Norris trophies down the road... I'd go for Yakupov 1st and Murray second. I just like what a dynamic goal scoring offensive player like Yakupov could bring to the lineup... he adds another dimension to the team and takes the club above being just a one line show... which it most often is on many nights.
No doubt a Norris winning dman would be brilliant as well... but I'd just as soon have a solid top 4 squad of dmen back there (which the Oilers don't have yet either).