Stay away from Nordic... lousy reliability... had to cut mine up and it was only 6 years old... wanted $2000+ to fix it...
Whatever hot tub you choose, think about the insulation.. you won't be able to find a leak/cracked pipe with foam covering all the pipes/back of the jets. AND your tub will leak!! Make sure you have "easily removable" insulation... ... also, I do not recommend putting a deck around the Hot tub, while a deck looks good, when you get someone to come out and service it (leaks, pumps, whatever) they will either charge you extra (like $400-600) or say they don't have time...
Other than that.. good luck!