Class C’s on a Chevy chassis do not have passenger seat leg room issues because the dog house is smaller.
I agree with Bumpy that the Tiffin brand is more respected.
I had a class A. One of the reasons I prefer a class C is when I stop I can open the door and get out. Be that for gas, food or whatever. A second reason is fewer steps to get in & out.
As said before, once the slides are in what is not available to you and do you care. While inspecting a possible purchase take your shoes off and get into the shower and pretend to take one. Can you? Is the floor firm? The same is true for use of the toilet. Is there enough kitchen counter space for you to prepare food? A pre-purchase inspection is a very good idea. I drove my current rig 70 miles so my trusted mechanic could have a look see before I bought it.
As far as pricing goes I look at rvtrader.com for a benchmark.