Shows are a great chance to shop and compare side by side. I've actually found the pressure to be lower than on lots since I can just walk to the next dealer. But, I've never gotten too serious buying at a show either so maybe once you get into it they start with the pressure.
You can shop floor plans, models and price online until your eyes glaze over. I really like shows to be able to look closely at the fit/finish of a given manufacturer and product line. I find the show seldom has the exact unit I'm looking for but being able to walk through one that is close is nice to help get an idea. I'd be much more willing to set out on a long drive to pick something up or to order after being able to see and touch a similar unit.