SP5k PDW OR SP5 I CANT DECIDE

I have enough money saved up to get either a sp5k pdw or a sp5. Both are around 2800 dollars. I like both guns equally cuz of media such as cod black ops, half life, die hard, the matrix etc. Also, I have a ps90 for a pcc already. Which sp5 should I get first and hows the recoil on the sp5k pdw compared to sp5?