There's a rumour that Nvidia is developing a GPU strictly for mining. With the prices of cards being so high and that rumour going around, I'd honestly wait for a possible announcement.
I wouldn't buy a premade mining rig, most will be overpriced and trying to take advantage of newer miners that don't quite understand how things go. Take a look at some altcoins you'd want to mine, find some cards you'd be interested in getting, then see what their hashrates are on them.
That said, all cards will be ready to mine. You just download the relevant mining software on the PC and edit your pool login details, then off you are.
Thanks for this, just what I needed! I'll look into it more and wait for that announcement, cheers
No problem. Feel free to ask me if you have any other questions about mining.
Cheers! Will do