If stability and reliability are paramount to you, you might consider getting the older version. At this point the hardware has been well tested and I feel like you might be beta testing less on a gen 1 vs a gen 2. That being said my personal experience is that I've never felt like a beta tester for valve and I'm sure you'll be happy with either. Cheers!
I bought one 3 months ago after going back and forth for ages. It's really good but I wish I had either bought it immediately or waited a few more months. Don't hesitate, go for it.