I always felt most cars were chopped too much. I think 2" is just enough to make people wonder but not lose the lines of the car. IMO
Anything less than 4" is a waste of time. 4" to 5" looks the best. Channeling-NEVER! Just my opinion.
Don't chop too much. I've done that before. It may look cool, but it gets to be uncomfortable in just a couple of days. An inch too much can ruin your ride.
I think on a full fendered car this is perfect. IMO too much chop on a fendered car doesn't look right. Fenderless can still look good with 5 or 6 inches, it depends on stance. Too tall with too much chop looks off, to me anyway.
4 inches will make the statment and still be drivable. http://www.jalopyjournal.com/forum/showthread.php?t=409232