Upgrade or new PC time ?

[paul_y3k]

my current desktop is getting a little long in the the tooth and I'm trying to decide whether it's worth upgrading or just replacing.
Ideally looking to make quite a large leap in performance as I've started to get back into flight sims (DCS mainly) and would like something to run it on a good level.
currently spec is :
Summary
CPU
Intel Core i7 3770K @ 3.50GHz 45 °C
Ivy Bridge 22nm Technology
RAM
16.0GB Dual-Channel DDR3 @ 798MHz (9-9-9-24)
Motherboard
Gigabyte Technology Co. Ltd. Z77P-D3 (Intel Core i7-3770K CPU @ 3.50GHz) 32 °C
Graphics
2047MB NVIDIA GeForce GTX 760 (ASUStek Computer Inc) 35 °C
Storage
1863GB Seagate ST2000DM001-9YN164 (SATA ) 36 °C
111GB INTEL SSDSC2BW120A (SATA (SSD))

I was initially thinking just upping the RAM to 32gb and changing the GPU. However i dont seem to be able to find another 2 8gb ram boards and I'm totally lost with the GPU's. I'm not lokoing to go VR as it makes me poorly. Maybe add another SSD as well.

I intend to pull the side off later to work out what PSU I have available too.