Hub help please

Can someone advice please,

I have to buy a new computer as my present one is very old . I currently have a virgin hub 3.0. The new computers I am looking at all support  WiFi 6. The virgin hub information page says a Hub 3 supports upto WiFi 5.  Hub 5 supports WiFi 6. 
I have live chatted to virgin and they say hub 3 does support WiFi 6 and if it doesn’t and I quote 

“Rest assured that, the Hub 3 is certainly compatible and would work with the WIFI 6, if it is not working, then we would take the responsibility for this and get the Hub changed upon checks conducted by the technician.”

However at present I am on a rolling month out of contract having downgraded my package as the prices were getting very costly.   I have  also seen that Virgin will charge a set fee and installation costs to have a new hub. I appreciate I now have  a medium internet speed (M250) and have read that a hub 5 would only be an option if I upgraded to faster speeds which at present I don’t wish to do. and there are no hub upgrade options on my account . 
Can anyone who is technically minded be able to tell simply what my options are, my daughter has been helping me as this is all very confusing  as I can’t get a new computer unless I know what hub I need  to support the WiFi as there appears to be conflicting official information on Virgin media’s help and support pages. Thank you for taking the time to read this.