Under £250 at present...
Assuming Nvidia, the 1660 Super is the most powerful option. It's a 6GB card and will require a cable from the PSU for additional power, as most of it's more powerful relatives do.
If AMD Radeon is your thing, the RX580 is the most powerful option under £250. It has 8GB instead, but is less impressive in benchmarks.
If you have your heart set on 8GB, I would recommend looking for a 2060 Super. It'll depend on if you're planning on gaming above 1080p. Not sure if the 6GB cards are up to 2K gaming, and while I'm sure the AMD 8GB is up to it, I wouldn't expect astounding FPS.
A couple of years ago, I was swithering on 1060 3GB vs 1060 6GB, and along came a factory clocked EVGA Ultra Silent (silly name) 1070Ti, with 8GB, but the factory overclock means it runs at speeds more in line with a 1080, depending on the benchmark or task.
Here's a benchmark score, and where it was compared to benchmark averages at the time - https://i.ibb.co/Zh2X6FF/PM1070ti.jpg
Obviously, the card isn't that near 1080Ti cards that have been properly configured and tweaked, but it's on a par with 1080s (10% faster).
Now at the time, the card I wanted was around £465, which was too much for my taste. There were other 1070Tis for around £430-£450, but that wasn't the one I wanted. Then my card went on offer somewhere, and I grabbed it for £395.
Still very expensive, but it's for a system hoping to last 5+ years.
While we're on the subject, I have a 2700x CPU, which was £300-ish a couple of years back. Right now it's priced at £170 to £220-ish, depending where you look. A 3700x is priced at £100 more for an extra 15% performance. I imagine a 2700x would be an adequate 'entry level' 8-core CPU for FS2020.
Lastly, I would think very hard about how you setup your storage for FS2020, operating system, orthos etc. If you're keen, you could drop £200 for a 2TB NVME drive. The going rate for 1TB, 2TB, and 4TB SSD is around £100 per TB. Cheaper than that, and they're probably slow SSDs, while the very fast models at 2TB and 4TB are pricey.
Meanwhile, you can get a WD Gold 10TB for £230-£250. I don't recommend HDDs these days, but some FS users are kinda forced down that path or have to pay thousands for storage.
Edited by camieabz (Tue 20-Oct-20 03:27:31)