Listen to this man! He is absolutely bang on. That's my only regret with going Samsung Galaxy instead of Nexus.
You'll only regret it if you have an obsession with upgrading your OS. If you don't really care, any phone running ICS right now will suit you fine.
So the UI responsiveness updates that were implemented in Jelly Bean, I shouldn't care about those kinds of things?
Wanting an updated OS != obsession over OS updates.
If you don't notice the UI being unresponsive on an ICS stock phone, no. (As an aside, the only good phone/tablet I've tried on ICS that has responsiveness issues is the Galaxy Nexus. Anecdotal, but still.)