Samuelgaming10 wroteAs i dont really know too much about the CPU, Mine is a 4GHZ with 6 cores, would i be downgrading by buying the 3.2GHZ 6 core?
The FX-8350 is an '8 core', not 6 core. Ryzen is significantly newer than the FX-8350 and has significantly better single core performance. It will be night and day difference between your FX-8350 and an R5 1600, regardless of the lower number of cores and lower clock speed.
Samuelgaming10 wroteWith the ram which you recommended, Would i need to buy this if i already have 16GB of Hyper X ram?
Yes, you need to buy new RAM. You can not re-use your current DDR3 RAM.
Samuelgaming10 wroteAnd What tier should my case be if i were to buy one? (Small, Medium, Large)
Confusing question. It doesn't matter, as long as your motherboard and what not fit in the case. Like I said, I'd recommend an Enthoo Pro M or Meshify C.