New spks for my little amps. More advice?

As far as my recording amps, my primary is a fantastic Magnatone Starlet (3.5-watt 8" open back 12AX7 50L6 35Z5), a Vox AC4C1 (PCB 4-watt 10" closed back  5751 12AX7 EL84), a VHT Special 6 (HW 6-watt 10" open back 12AX7 6V6), Blackstar HT5R 5W stock, and a Badcat Cougar 5 (PCB 5-watt 12" open back 12AX7 12AX7 EL84).

I'm looking to upgrade speakers in all but the Badcat, which has a Celestion V30 12". But I might switch that one, too.

I'm going to start with the Vox and the VHT and my Magnatone (speaker is sounding a little flabby). I don't have a choice about the 8", but I have questions about the 10"s.

I called Warehouse Guitar Speakers yesterday and had a nice chat with the fellow there. I described my issues, and he recommended that I go with the ET-10 for the Vox AC4C1:

https://wgs4.com/10-et10-65-watts

And a g10c for my VHT:

https://wgs4.com/g10c

The recommendations were based on various reasons and things I described about my amps, but he said that they like the way that the "Veteran" sounds and breaks up in pairs (or threes), but they <strong>don't</strong> like them in 1x combos. What I have read on the forum reinforces this.

My objective was to get rid of the fizz / shatter in the Vox while still sounding chimey, and to reduce how dark the VHT is.

So, would people concur? I worry a little about the vast mismatch in wattage; there was a post earlier about that, but it didn't really add clarity for me. Am I better off stepping down to a lower wattage WGS in both of these, or just take the advice? Will I never hear the glory of a speaker starting to stress?

Any recommendations on the other amps would be great. I'm probably going to re-speaker anything that someone strongly recommends.

Thanks!