Certainly on Camera bodies I think it is important to try the thing, hold it, see if it feels right.
I decided to ditch my dSLR and a few weeks ago I had decided on an Olympus E-M5, I have some m4/3 lenses. After trying the camera in the shop i decided that no way was this a camera I wanted. I DID love the Fuji XE-1 and it is sitting here waiting for the battery to charge! Look two systems? Don't ask! They will compliment each other
The thing is I might have saved some money on line but without a dealer I would have wasted time trying and where will the dealer be next time I need to try something?.... my view anyway. I'll also get some after sales service if I need it. I ought to add that the dealer, Park Cameras, are very good and are never pushy. I can think of one dealer whose manner convinced a friend that hell would freeze over before he sold her anything.