We've got a 2011. The 2012's are on the Mountaineer website rite now. They've added a model 357 but we like the cabinets like an office setup in the garage. Quality is not an issue at least with ours its never had any issues.
We have all the factory options you mentioned the Marquis Gold LP 5.5 generator and front air plus some others you didn't mention. We paid last year 42.5 out the door from Leisuretime RV in OKC. We had a similar deal from Lakeshore RV (Bob) in Michigan but the shipping made the local deal just a better for us. You can email nearly all these dealers for firm quotes. Thats what we did. Good luck. You'll love the 347.