Yes, they do have a lot of different lines. Seems each line is a little different with the Landmark being the top. Bighorn next and going on down. I know Landmark and Bighorn have better quality construction materials in the cabinets, solid wood, maybe the Big Country also, then they go to the wrapped stiles and a little cheaper materials. I think it would be best if you could go to a dealer or RV show and just compare for yourself the difference in cabinets and interior decorations and quality of components. This is
link to Heartlands RVs site where you can compare a lot of the specs.
I don't know of a dealer in your area myself, but we are having a Heartland Owners Rally in Spring, Tx. April 18--22, 2012. I'm sure you would be welcome to come and spend a little time with us at the Rayford Crossing RV Resort. You could see a lot of different units and meet lots of great people. Also Ron Hoover RV of Katy, Tx is helping sponsor the rally, so they will probably have one or two units on location also.
Jim M