I have a 13' NRS otter, and love it. But, NRS significantly downgraded their construction of their rafts last year. You can find it on their website. Not as thick hypalon, not as bit wear patches, etc. They are now made somewhere offshore, China or something like that.
I have a friend who just got a Maravia and it seems far superior in construction. The urethane is applied after all of the accessories, so all the handles and drings and such are further protected. Plus the seams are coated in the urethane. Overall it seems to be a great boat, but I believe they are a bit more expensive.
The Maravia floor is really cool too, not tubes like the NRS but what seems to be a solid floor. Not sure how they do it.
Maravia uses rope to hold the floor to the boat, which seems inferior, but given all the pluses of their boats they probably have good reason.
Plus you can get it in any color.
P.S. Get a 14' as 13 - 14 is the cutoff for larger tubes, wider boat and they are much roomier. Unless you want to run lots of low water, I would like to have a 14' for the room.