Argh. You guys are going to make me unsub my own thread! 
Let me explain where I am.
Ive been meaning to get a faster GPU for some time, and now that I've ordered a widescreen 35" 120Hz monitor with G sync, I feel it is the correct time to upgrade rather than keep hold of my 1070.
I was willing to spend £500ish, so I've stretched it to £650 with this GPU.
As some of you have said, the 1080TI vs the 2080 is swings and roundabouts I can see some games perform better on the 2080 and vice versa.
I dont mind sacrificing a little performance for the sake of lower GPU temps/less noise, I wont be overclocking for sure.
I was looking at the 2080 TI, but for an average increase of performance around 25% according to benchs, not sure I can warrant doubling my payment to a bag of sand....
I think Ive made the right choice, couldve gone with a 1080TI that is on for 550ish, but in hindsight, I think futureproofing with teh 2080 is probably the way to go plus with slightly lower gaming temps.
Am I being unreasonable with my expectations and justification here folks?

Let me explain where I am.
Ive been meaning to get a faster GPU for some time, and now that I've ordered a widescreen 35" 120Hz monitor with G sync, I feel it is the correct time to upgrade rather than keep hold of my 1070.
I was willing to spend £500ish, so I've stretched it to £650 with this GPU.
As some of you have said, the 1080TI vs the 2080 is swings and roundabouts I can see some games perform better on the 2080 and vice versa.
I dont mind sacrificing a little performance for the sake of lower GPU temps/less noise, I wont be overclocking for sure.
I was looking at the 2080 TI, but for an average increase of performance around 25% according to benchs, not sure I can warrant doubling my payment to a bag of sand....
I think Ive made the right choice, couldve gone with a 1080TI that is on for 550ish, but in hindsight, I think futureproofing with teh 2080 is probably the way to go plus with slightly lower gaming temps.
Am I being unreasonable with my expectations and justification here folks?