GRUxTSAR :
Gigabyte if you want raw cooling performance and ASUS if you want quiet performance
There are pretty much no 980 Asus Strix or DCII, there is no MSI Gaming that I have seen so far. There are a few Gigabyte G1's and EVGA SC available right now (on amazon) but with extreme prices. If ya look at the roundup review, the MSI from a componentry and build standpoint stands well above the competition. Given that MSI had the best 780, the best 780 Ti and the best 970, until the MSI 980 (and Asus) comes out and we see some comparative reviews, I would stand pat.
I have only seen one non reference review by Guru#D on the Gigabyte, nothing on anybody else's
Given what I read about the power delivery, component cooling and capacitors / chokes used on the EVGA 970 on the bit-tech site, as well as the defective cooler.... I'm not holding much hope that that's gonna be the card of choice. Bit-tech ranked the 970 cards MSI > Asus > EVGA .... Giga wasn't in the test