Look into asics they really are only option currently.
https://www.whattomine.com/coins?utf8=%E2%9C%93&scryptf=true&factor%5Bscrypt_hash_rate%5D=1000.0&factor%5Bscrypt_power%5D=380.0&scrypt_nf=true&factor%5Bscrypt_n_hr%5D=450.0&factor%5Bscrypt_n_p%5D=330.6&cha15f=true&factor%5Bcha15_hr%5D=3.0&factor%5Bcha15_p%5D=228.0&cha16f=true&factor%5Bcha16_hr%5D=400.0&factor%5Bcha16_p%5D=228.0&x11f=true&factor%5Bx11_hr%5D=5600.0&factor%5Bx11_p%5D=266.0&x13f=true&factor%5Bx13_hr%5D=4000.0&factor%5Bx13_p%5D=266.0&cn=true&factor%5Bcn_hr%5D=640.0&factor%5Bcn_p%5D=304.0&ns=true&factor%5Bns_hr%5D=410.0&factor%5Bns_p%5D=228.0&adapt=true&factor%5Bcost%5D=0.06&commit=Calculate&sort=Profitability24&volume=&revenue=24h&keccakf=true&factor%5Bkeccak_hr%5D=480.0&factor%5Bkeccak_p%5D=304.0&grof=true&factor%5Bgro_hr%5D=15.0&factor%5Bgro_p%5D=228.0&wx=true&factor%5Bwx_hr%5D=130.0&factor%5Bwx_p%5D=228.0&lre=true&factor%5Blre_hr%5D=1150.0&factor%5Blre_p%5D=228.0
You can see that one coin is currently giving a profit off .65$ a day per 280x, a 280x ( or 7970) cost around 100$ right now, you will need the rest of the hardware but it is relatively cheap (~200$) and gpus can be stacked to 4-5 a motherboard fairly easy. Now lets look say you have a rig with 5 gpus this would set you back 700$ (if you didn't get a deal on mobo ram, cpu and hdd) @.06$ kwh it will take you 161 days to roi, now that sounds pretty close to S5 roi.
Lets look at s5 roi, lets say you can snag one for 400$ shipped and if difficulty stay the same and at the same power rate were looking at 197 days for break even. So heres the thing, one is mining altcoins and trading them and one is mining bitcoin.
Advantages of GPU Mining
Any Algo
Higher Resale
More opportunity to resale
easier to upgrade components
Advantages of Asic mining
Directly mines Bitcoin
Can solo mine for lottery
Simple to set up
Possibly longer component life span
The best option would be to buy a used ASIC like an S3 for less than $100. It will make money faster then with GPUs and its cheaper. The S5 is way overpriced. And its very difficult to buy an 280x for only $100, they are more like $150.
The HD mining is not a very good idea with a coin thats only worth 100 sats.