>>273476390
>what the differences would be in my experience between this unit and a $500+ one?

Main difference would be the tracking. With a SteamVR kit you would have better quality tracking, and the ability to use extra trackers for full body tracking if being a pole dancing VRChat tranny is your thing.

Can't overstate the importance of good quality tracking. Any glitches, jerks, wobbles, lapses, jumps, instabilities in tracking are going to feel terrible so you want as few of them as possible. 

>i7 4790K with 12GB ram and Nvidia 1070Ti
It's acceptable.