I have not used either the Ampeg 210av's or the Hathor 1203. But, I have used my WA with a Scout 12, 2 x Scout 12's, Scout 12 + Scout 15, Accugroove Tri 115, Mesa Powerhouse 1x12, Powerhouse 2x12, Aguilar GS112NT (and the PH 1x12 + GS112NT), Berg NV610, Berg CN212, Ampeg 115HE and an LDS 2x15 (loaded with Faital 15PR400's).
The WA sounds great into just about all of these cabs. The ones I liked the least were the Aggie GS112NT and the Mesa PH 1x12, either separate or together. And this is just a matter of personal taste really, they did not sound bad in any way, they just did not sound particularly great. On the other hand, all the rest of the cabs I listed above made the WA sound good or great. I also liked the Scout cabs too, but ultimately I found that they did not get the most out of the WA's 300w (cab efficiency issue ??). I still use my WA/112 combo for my run-around rehearsal schedule. Plenty of volume for any rehearsal I typically need to do, and great tone.
Worldeeeter's negative experience with the WA and Berg 1x12's is interesting, as I find the Berg cabs (CN212 and NV610) make the WA sound wonderful. These 2 cabs are my hands down first choice go-to cabs with the WA depending on the volume needs of specific gigs.
good luck on your cab search. I think many in this thread would join me in saying that the WA is one of those heads that sounds great into a wide variety of cabs (Worldeeter's experience aside).