there are 3 different levels of medallion so make sure you are being quoted silverline which is their base level. the cost difference between the silver, gold and platinum is vast.
i have the silverline lancaster. i like them but there are some things that were a little disappointing so if the difference is $7000 and its an apples to apples comparision, i wouldn't think it was worth it.
the timberlake is the kd version of lowes shenedoah/hd american woodmark or aristokraft cabs. now i can't remember which. if you search for those brands, you should get an answer.