It will take you a year to get your return of investment if you choose asic miner instead, GPU mining profits is not that good anymore and checking websites like whattomine shows that asic is the best
I think Asics have a different approach, you can estimate the ROI in a year from now, but them Bitmain comes and launch a new asic and the old became almost obsolete and you won't have access to them until it's too late
And with Asic you won't have a lot of coins to mine, and another thing is you can always sell GPUs for different kind of people, so only do Asics if you really knows what you're doing