Question Do I Boot Camp my Mac or build a PC?

[SizedMouse9]

I have a 2011 iMac that's a little bit upgraded and I have a gaming PC that ive been waiting to upgrade. I would like to know if it would be better to just to use boot camp on my mac and have an external graphics card or salvage some parts from the mac to add to my new PC build.

iMac Specs:
20 GB Ram DDR3
Intel i5 3.1 GHz
1 TB SSD

My Current Computer:
16 GB Ram DDR3
AMD FX-8320
AMD Radeon R7 250
2 TB HDD 7200 RPM
1920x1080 60 Hz monitor

My New Build:
https://pcpartpicker.com/list/Vfj8cY
Intel i5 (CPU from the Mac)
ASRock Z390 LGA1151 Motherboard
Crucial MX500 1 TB SSD (SSD from the Mac)
Trident Z 32 GB DDR4-3000
EVGA GTX 1050 Ti
NZXT H500
EVGA SuperNOVA 750 W 80+ Gold Certified

I wanted my new PC to have room for upgrade (specifically the CPU and GPU) but am on a much tighter budget at the moment. Later I would like to upgrade the GPU to at least an RTX 2070 and the CPU to at least an Intel core i7. I dont want to spend much over $1000. Would it be more effective to boot camp the Mac and get an external GPU or take the CPU out (if possible) along with the SSD and take the HDD from my old PC and add it to my new build.

 

[CountMike]

Which i5 would that be ?

 

[SizedMouse9]

Which i5 would that be ?

I believe its an 8600