For 8700k, you need the 8700k, a new mobo and a new RAM kit.
Normally, The upgrade from 3770k to 8700k can be worth the price and also can be not worth the price, it depends on what you are doing.
For gaming, some games do performa better on 8700k but for most games, your 3770k should still be doing quite ok.
If you are buying 8700k+monbo+RAM using the normal price, I would not do this, the performance gain is too small for the price.
However,
If you can sell your 3770k+mobo+RAM with good price and buy 8700k+mobo+RAM....if you can spend only USD150 in total, I would hit the buy button!
The performance gain you get does worth USD150.
You did mention USD150. I just assume you can sell your old parts for extremely good price.
I hope you...