Adam and Buckeye, those were both great responses and thank you for the input.
I'm a Deerfield resident and I've confirmed from the Water co that there are Chloramines present in Deerfield water supply. I've got a cartridge on order from BRS to swap my RODI unit over. Just my opinion in this matter, but I don't see the harm in EVERYONE running Catalytic carbon as the second chamber in an RODI. More and more municipalities will be switching their filtration over (cost-saving initiatives from what my Deerfield rep told me) and introducing chloramines into the water supply, so it's probably not a bad idea to upgrade your filter. It will cost you roughly 20 bucks to upgrade. That's not exactly pocket change, but let's be honest...in this hobby,neither is it a break-the-bank investment. Again, just my opinion.