Can't offer an opinion on the machines your looking at but wanted to suggest stopping in to Stony Brook Sew & Vac in Wilmington as well (
http://www.stonybrooksewandvac.com/store-locations.htm). I've not been to that location but it is the dealer I use here in Central NJ. I bought my viking from them but know they are carrying other brands now as well. Happy with the deals and service I get from them. Might be worth a look. And you can ask them if they have a local repair guy or if it's the same one that travels to all their locations. If it's the same guy that travels, he's a gem of a repair person should you ever need his services.