Okay so I'll go with nividia, 1080 ti
Nividia may release a newer version soon ?
NVIDIA releases new versions all the time. Many speculate that the VOLTA gpu will come out soon, but it's been months and nothing new has come out. Even when new GPUs come out they will be instantly out of stock. Don't waste your time waiting for new GPUs to come out. Mining is a race against time and a race against ETH's ice age and switch to POS. The sooner you start, the more profits you potentially earn to gain.
That is nice information buddy. As he wishes to start his mining rig he can buy the 1080ti cards to make the multiple rig for the amount that op has wish to invest on making rig. As above said this fund far enough to make around 3 to 4 rigs with the 10 cards in the every rig.
mining ethereum and monero is best coins to mine and making decent profit as its hash power and growth of the concern altcoins too.