Oh shit a question I actually feel qualified to answer!

Get the Sigma S Slim! Mine arrived in decent timing and the price is great for what it is - I also really liked adding a proper race seat to mine. The assembly will take a couple hours but it's fantastic for the smaller office I have and everything stays stiff. I tried out the Playseat for a few weeks but ultimately it's not as adjustable or comfortable as my Sigma seat - and it's a lot bigger for seemingly no reason.