I am using one plus 5t for about 10 months now and my experience has been Amazing so far. Powerful yet battery efficient. Battery is actually the best thing in this device. Despite heavy usage it gives me just a little more than a day. If 6 is anything like 5T then go for it. Reviews were pretty great too. Do check MKHBHD's latest video of him switching from pixel 2 to ine plus 6 video. S9 is a good option, I really liked the screen. I think its best in the market but there two things to consider. It has a very fragile and easily broken screen thanks to edge and price is very high.