Hello fellow miners

I am a complete newbie in this field who is trying his luck
Please i want you people to guide me on the hardware.

I have a budget of around $1500. I know bitcoin mining is not profitable anymore as the difficulty have risen up it is impossible to get a postive ROI.
So with which coins should i start sha256 or scrypt?
Remember that i have a budget of $1500. In my country i can create a rig with 3 hd7950s for that amount. On contrary my friend is giving me 120ghs miner for $600

So with what piece of hard should i start?
3x Hd 7950 ~ $1400-1500 -- only scrypt mining
2x 120ghs Asic Miner ~ $1200 -- only sha256 mining
1x 120ghs Asic miner & 2x hd 7950 ~ $1500-1600 -- combined mining

Which setup will give me the maximum yield?
Plus i want to know what is more profitable? Alt scrypt mining or alt sha256 mining? Coin warz always show me that sha256 is always profitable using above hardware whereas coinchoose show that scrypt coins like doge etc has 4000% profitability of bitcoin and sha256 coins are at the bottom of the list. Please help me guys as i want to finalise hardware in this week.