I have a 2013 ford focus st, Whats the best tune I can get for this car? How much hp and tq Ill gain for stage 3?

I guys I wanted to tunne my focus st. I heard cobb stsge 3 tunne was good, but not sure. How much hp and tq Il gain from cobb stage 3. How much will it improve my 1/4 mile time? If so other tunnes are better what hp and tq deffrence from cobb and timing?
Update: Looking to use only 94 octain gas though.