I guess I'm one of those guys laid up in the hospital. 
I prefer to purchase Sheet replacements however I have started collecting the SNRs when $ allows. Hudson's comments above and on another thread make me feel better knowing what I have as SNRs will remain SNRs. Having the SNRs in the Charlton Catalogue should ease any concerns collectors have about collecting them, however this may result in the value of these notes going higher due to the demand.
Oops, here comes the nurse. 
Is the nurse cute? lol
Anyway... thanks for noting that post I made. I guess the thing that everyone has learned with regards to replacements, is to be somewhat cautious at first, until more information is available. As we have found out over the years, as more information becomes available, some designations have changed. Although frustrating at times, however, it is all in the name of the higher good- which is sorting out the facts.
These days, the process by which notes become officially recognized as sheet or SNRs is more stringent than ever before, because the last thing that anyone wants is to have a designation that needs to be fixed. So, like the Vatican authenticating real miracles, the body of collectors try to replicate that precision in detail and depth.
I am happy to resume my brick research in a few months. After this 10 month holiday, I am very excited for this. :-)
Hudson
Poll