Question Newbie needs advice on prebuilt PC

[Walpurgis117]

I'm a noob when it comes to PC components, but I've been looking to buy a replacement PC to replace my 3.5 year old rig and I intend to game at 1440p. I've been waiting for the RTX 4000 series to be announced and was hoping to get a 4070. Seeing how expensive the new 4080 is has made me re-evaluate, and I'm considering buying a (pre-built) PC with a 3000 series card now that the prices are coming down. A vendor has been offering the following specs at a discounted price at the equivalent of about US$2,300:

• Intel Core i7 13700KF | 5.4GHz | 16 Cores 24 Threads
• GIGABYTE B660 GAMING X AX DDR4
• ZOTAC RTX 3090Ti AMP Extreme Holo 24GB
• 32GB Klevv Cras X DDR4 4000MHz (16GB X 2)
• 1TB Lexar NM760 Gen4 NVMe SSD
• 3TB Toshiba 3.5" 7200RPM Harddrive
• 850W Deepcool 80+ Gold

I'd like some advice as to whether you guys think this is a good buy at this time, or would the predicted features of the 4000 series (perhaps the 'cancelled' 12 GB 4080 which is supposedly going to be rebranded as the 4070Ti??) be a significant enough improvement to be worth the presumably significantly increased cost (or how about an AMD card?).

Also, is DDR5 RAM really necessary for future-proofing or is it OK to stick with DDR4?
Does the i7 13700KF really provide a significant boost i5 13600KF for 1440p gaming?
I've never had an AMD processor before. Should I consider an AMD Ryzen 5 7600X or Ryzen 7 7700X if the price is good?

 

[Why_Me]

That board will struggle with that cpu due to it's VRM's and the power supply isn't one you'll ever see recommended here nor anywhere tmk. btw is this a UK build ... asking because I see Klevv RAM listed on that build.