@b_limo - Thanks for your reply. Just went out to the GR Research site and the upgrade for these speakers is now $345. So, not a chance I'm going to invest that much into an upgrade for these. I could easily buy a much better speaker for that money. For instance, I could buy a pair of Spica TC-50 for less.
For now, they sound good enough for the current use case. If I ever decide to step up my office system, I'll probably buy a pair of small-ish floor standers.