Why don’t you use something like Tailscale? Other than that using non standard ports greatly reduces the risks of you getting compromised. The majority of attacks come from port scanners scanning for default ports and trying to use known vulnerabilities.
What are you going to use this GPU for. Simply for playing and you don’t care about ray tracing AMD is king. Or if you find a deal on Intel.
Self hosting LLMs and hobby AI/ML projects, NVIDIA.
Blender - NVIDIA
Internet Streaming - NVIDIA
Video editing - NVIDIA
Plex/Jellyfin - Intel
Unfortunately in most cases NVIDIA is still the king.
Check this link that will give you some ideas about the different GPUs: https://www.tomshardware.com/reviews/best-gpus,4380.html