I think most people would agree that the shorter barreled GPs have a better balance and quicker handling, at the expense of some lost velocity.
For instance, if you had to track a fast-moving attacker, you may not want that extra nose-heaviness.
But for a target or hunting gun, I agree 100%.
4" is a good compromise for those who don't want to lose too much velocity, but also want good handling.
3" is a good compromise for those who want a bit longer sight radius or a bit more weight, but would otherwise prefer a snub.
You could always look into a Redhawk in 7.5" or a Super Redhawk in 7.5" or 9.5" if you really like the super-heavy, long barrel. I love my 7.5" Redhawk, but I have to admit it gets heavy to hold up after a while.
It is much easier to shoot well than the 3" SP-101 pictured below it. I've since added a laser grip to the SP-101, which makes it very accurate.... when the laser can be seen. (i.e. not in full daylight at ranges of more than 10 yards)