Great choice. Now you can feel the difference between the sealed vs ported and decide which is better for your setup.
Next, I would look at de-coupling the sub from the floor, since a lot of energy is transferred directly from the sub to the floor (and to your neighbors).
Lots of information online, here's a thread to get started.
Claims about the benefits of isolation pads are largely anecdotal sighted testing.
You'll want to read the last link posted to that thread you shared: https://ethanwiner.com/speaker_isolation.htm
I have not seent objective data that supports the claims that isolation has the amazing improvements for subs that people claim.
As Winer points out, most sound wave travels through the air. So at best, the isolation pads reduce cabinet resonance transfer into the floor. Which certainly could be noticeable with a budget sub. But those SVS subs are unlikely to have much cabinet resonance.