I have an RV-10 with a Garmin 560 currently in it. It works great BUT I can't use it to fly IFR so I can't put the /G in the remarks section. SOOOOO I decided to purchase either a Garmin 430 or the 650. The 650 is about $1,600 more BUT it does have the touch screen and does away with twisting knobs. As I said I currently have a 560 and it is ALSO a touch screen just like the 650. Tonight I flew the airplane to norther CA with strong surface winds and over the mountains and hills it got moderate chop most of the way. This was probably a wake up call because when it happened in the past I had the same problem, pressing the right button on the touch screen. The darn thing was jumping around so badly that it was very difficult to make the inputs that I needed to make. That got me to thinking that perhaps the older 430 with the twist knobs might actually be the better choice. Has anyone else had this same problem using the touch screen interface and what did you do about it. I am going to make my decision early next week so any information or input would be appreciated.