Since my beloved Netgear 4300V2 is bootlooping still and I don't have the time to fix it right now, so need a backup/replacement router for it. Both cost almost the same at Pkr 2250 and Pkr 2900 another option is Netgear Nighthawk R6700 but it costs Pkr 7300.
We do expect you to 'do your homework' as one would say. We don't do spoonfeeding. So: check the Table of Hardware for all those devices. Scrap the Broadcom stuff. Scrap the Linksys WRT AC series (all Marvell wireless as well). What you want to look at is ath10k or mt76 wireless (personally I prefer the latter). Your list will be a lot shorter. Then you can come back and ask again (or decide yourself). Make sure you got enough flash - ideally 16 MB, and RAM, ideally 128 MB or more.
AFAIK the R6700, R7200 and R7450 are all similar MT7621 platforms with MT7615 radios, 2nd gen 802.11ac. NAND flash though, but Netgear's recovery (nmrpflash) is rather sturdy.
I got lucky with netgear recovery once, but still trying to find time for second.
Nmrpflash developer was kind enough to develop new versions for my issue, but I don't get enough time this week on ethernet enabled system.
USB to Ethernet adapter will be delivered tomorrow.
Need at least 128mb flash to much stuff to install, ram obviously 128mb+.
I am confused between EA7500 V1 and V2. Qualcomm 8064 vs MT7621 but again these require 1.8V serial as backup.
QCA needs more RAM than MediaTek for their 802.11ac drivers (256 MB should be okay though, also for QCA). You'll have more headroom on MediaTek. I'd skip the EA6350. The EA7500 v1 is the most powerful SoC you can get for the price. I'd advise the EA7500 v2, since the R6700 is pricier. But again, personal preference for MediaTek here.
For 1.8V serial connections the FTDI FT232RL based usb2serial adapters might be needed (do check that your desired one explicitly supports 1.8V, even if the main chip supports it, there's no guarantee that the manufacturer adds the supporting components to use it).