You want 1080p gaming, with some effects such as AA, with Wii and Gamecube games.
Pentium G4560 at stock speed and a GTX 1050 should do that. The GT 1030 may be capable of doing it, but without having tested it myself, I suspect it may not be capable of doing it for all games. I also have doubts that it will be able to handle much in the way of optional effects like AA at 1080p. I base this on having built a Dolphin box recently with a 1050 ti, and extrapolating from there.
As for RAM, if you never want to run custom texture packs, 4 GB should be fine. But if you have any interest in HD textures, consider going with 8 GB now. I'm running an 8 GB config and so far everything I've tried has worked well. I was told that very large texture packs may require even more RAM, particularly with the "pre-load all custom textures" setting. But I use that setting, and so far no issues with 8 GB.
Pentium G4560 at stock speed and a GTX 1050 should do that. The GT 1030 may be capable of doing it, but without having tested it myself, I suspect it may not be capable of doing it for all games. I also have doubts that it will be able to handle much in the way of optional effects like AA at 1080p. I base this on having built a Dolphin box recently with a 1050 ti, and extrapolating from there.
As for RAM, if you never want to run custom texture packs, 4 GB should be fine. But if you have any interest in HD textures, consider going with 8 GB now. I'm running an 8 GB config and so far everything I've tried has worked well. I was told that very large texture packs may require even more RAM, particularly with the "pre-load all custom textures" setting. But I use that setting, and so far no issues with 8 GB.