To be honest, I wouldn't expect either of those to be significantly better in that respect. If you're really not happy it might be worth waiting for 2nd generation kit.
you are absolutely right! 2160 x 1200 might look like sufficient resolution, but the situation is similar to taking a 320x200 video and watching it on 22" screen. It will be ugly. 2160 x 1200 is enough for monitors, but you are actually watching gigantic cinema screen sooo... it looks pretty much like 800x600 on normal monitor. Distant objects are blurry, lines are pixelated etc.
There are some technical issues related to providing bigger resolution, such as size of the datastream, performance of recent graphic cards etc. I think HTC is working on 4k VR, but they postponed the development because of mentioned issues.
Still, it is the best you can get right now to "feel" the Universe... I love it and got used to it. But true is when my friends are asking about whether to buy it or not, I am usually recommending to wait for the next gen. Plus, there is not so much REALLY good VR games so far. Elite is THE BEST!!!!!
BTW: if you could say something on https://forums.frontier.co.uk/showthread.php/405912-dashboard-skins?highlight=dashboard - Would be really appreciated!!!
Personally, I like cockpits of the ships, walk them as much as Oculus cable allows (bad we can't walk whole ship or turn off the lights), also the feeling when you are in SRV, music muted and you dismiss the ship, you watch it disappearing and then... pure cosmic loneliness. Or the rings, asteroids are just beautiful...
And what I hate the most? Everything looks actually smaller than it is. You don't really feel the size of things... Not sure why, maybe because there is nothing really familiar to compare...