Hi Joe S are you located in the USA if so i would look at Micro Center i heard good reviews on them if you are capable of building your own rig you can logon to their site click parts picker and if not a good combination will give good alternatives or talk to the staff if you have never build a rig before they'll build it for you.
If your in the UK do you have a local family run computer shop near you tell them what your buget is and what games you want to play on your new rig and they will build you a beast machine don't go to pc world and buy one off the shelf 4070 gpu nice but the M/B is the cheapest that will run a 4070 gpu also will only have 2 ram slots and your psu is not 80 gold rated only a £35 $45 psu you dont want to sufer buyer regret do your spade work looking for the best option Sir.
https://www.microcenter.com/?lat=54....long=-1.601625