POS Master,
Some good points, and it looks like you've done your homework.
Maitre D' is candaian, as are Silverware and System3--maybe I am shooting myself in the foot with this one, but the only reason I even mentioned Maitre D is because we seem to run into them a lot. Software-wise, I am not sure where they stand, but I am assuming they must be decent.
Restaurant Manager--I'd call them a tweener

Not small, but not big either. A solid software package, with a nice handheld. Whether or not I'd buy from them depends on how I felt about their dealer.
POSitouch--a big guy for sure--not as hot as Micros or Aloha, but established. In the end, you're right---they could probably take or leave your business. On the plus side, they have been around for years.
Ciao--I am at a loss here--dont know 'em, never heard of 'em.
Digital Dining-I agree. Doesn't knock my socks off, but they've been around for a while, and have a solid client base.
Not long ago, we ran into a client who was also very impressed with POSnet. Again, wish I had more info for ya. The only thing I got from it was that they were pushing the client hard with the "we can support you from here" aspect. That leads me to believe they probably don't have an established dealer network in local markets. The PRO to this is a lower price to the end user (hopefully). The CON is, no local representation (unless they are local to you, of course).
I agree with where you're going. Leaving the big guys for the corporate accounts and chains. For a smaller, single chain restaurant, go with someone who is stable, but hungry for your business. The little guys need to stick together. When I buy hardware for my business, do you think I go to Best Buy or Circuit City? Hell no.
How many terminals are you looking for, and what is your budget?