four seasons homes

[Wanda]

I have priced a Four seasons 2004 Summerbrooke 32 x 80, 4BR/3BTH/RTRT and FR in a community in Michigan (retailer was onsite) and was comfortable with it ($90k) with all the bells and whistles my family needed and WANTED.
The retailer (Medallion) is offering me a few incentives/rebates, however dealers are offering the same, but the price of the home advertised with the dealer(which is the same floor plan) is significantly less. I want to get the most home for my money and one that will last the life of our growing children, 3 preteens and one younger one.
My first question is, should I price this home with a dealer as well?
My second question is do you have any information on Four Seasons (their quality of work, durable of their homes, etc.), or is there anyone out therre currently residing in a Four SEasons home that can give me their input?
Also, Champion has the same floor plan that was available with four seasons, could you give me some comparisons, as to the quality, durability, price,etc.?