You may want to check out catalog success magizine they often have mail order managment systems advertised. Or google... When we were looking I found things that were great products, much better then mom but then their price was also MUCH higher and they were overkill for a business as small as we are.
in response to your question-
#5) What else is there to use besides Sitelink, if we decide to keep MoM as our store database?
Any help and other suggestions would be appreciated.
You may want to look at www.commercev3.com they have been trying for some time to get me to move from sitelink to them...
Ken