So, not a motorhome, but my 5er is a 2002 Gulfstream Sea Hawk. Shortly after they changed the Sea Hawk name to Prairie Schooner and then to Yellowstone (I believe). Anyway, the Sea Hawk/Schooner was top of their line at the time.
Regardless of how it was back then, you are now looking at a 15 year old coach. It is much more important how the previous owner(s) took care of it than where it fell in a hierarchy when it was built.
And for the record, we are very happy with our units build quality.
2012 RAM 3500 Laramie Longhorn DRW CC 4x4 Max Tow, Cummins HO, 60 gallon RDS aux fuel tank, Reese 18k Elite hitch
2003 Dodge Ram 3500 QC SB 4x4 Cummins HO NV5600 with Smarty JR, Jacobs EB (sold)
2002 Gulf Stream Sea Hawk 29FRB with Honda EV6010