#13 -- Maybe if it was a telelphone, but otherwise it looks like a hotel logo. Just doesn't work for us.
#16 -- A little top heavy. Isn't clear from far back that there is an R and a D in the icon.
#17 -- I liked this a lot but the other people reviewing this said that the backwards R was too much like Toys R Us and that there might be some legal issues there. Another person commented that he didn't like it because it was too much font related and no real icon. Would have ranked high on my list, but I'm not the only one making the calls.