prime z270-ar

Hello Currently have an Intel Core i7-7700, thinking of upgrading, whats the most optimal CPU for a PRIME Z270-AR in 2020? Rest of PC: GIGABYTE RTX 2070 Super WindForce 3 OC DDR4-2400 32GB RAM PSU 650W

Hello I am looking (probably when the new NVIDA cards are released) to upgrade my GPU to a GTX 2070 (550w needed) maybe even GTX 2080 (650w needed) or another better recomendation (looking at a GPU between Australian $600 - $1,000)? Questions: Enough space in the case? Have a GPU and a...