Interesting - so you are saying that on the non-pro models they don't accept their native resolution as input? Sounds odd, but I believe you. I've seen more odd. As I alluded to earlier, this becomes a market research issue, and I'm sure you have good people who know what the sales numbers are for the pro models. If its high enough, then it makes sense to do it, otherwise, not so much. In general, the idea of having a fixed number of output options to reduce cost of course makes complete sense.
Can you confirm the 3 new computer settings?