Thank you to everyone for your comments. They are very helpful.
Here's my thought process on the screaming eagle vs. the J or the R. I have a J now, and love it. I've gladly spent the money to upgrade the avionics, paint, interior, and engine. My current weight requirements for typical mission is 560 pounds. That means I can have 57 gal fuel. Most of the time I can make it non-stop. Sometimes I need to stop due to headwinds and/or IFR reserves. The complication is my family is growing so this problem only gets worse.
Most R models leave me in the same situation. However, it seems that the useful load in a Screaming Eagle is different--75 gal fuel and a useful load of 675 pounds or so. It sounds like I still need to adhere to the 3,200 pound landing weight, but I don't see that as an issue since my flights are always for > 2 hours.
Am I missing something?