You never completed your user information, so we do not know where you are located.
As I have done in the past, if you are in the Central Florida area, I will let you try some of mine
I have had many different barrel lengths in the 500 S&W Magnum
My 1st was a 12" barrel that was built 6 months prior to S&W releasing their firearms so that we could do some load development. I still have this one for when I want MAXIMUM velocity from the round
I have had the original 8 3/8" along with the 6 1/2" standard profile barrel versions. Both have since been sold.
I have kept the 2 3/4" because it is such a hoot to shoot and it makes a GREAT Conversation piece when discussing snubbies

Much like CH4, I really like the balance of the 4" (really 3" with a 1" Comp). The 4" also carries very nicely on the belt. This is the one that has probably been shot the most over the past almost 15 years now
I also have one of the John Ross 5" guns which also feels pretty good in the hands. Though at the moment, I am not sure where I put the picture of this one
If you are a hand loader, the 500 S&W Magnum is a fantastic cartridge. With available projectiles ranging in mass from the petite 275 grain JHPs up to the massive 725 grain wadcutters. Power levels can be had from mild to wild.
When looking at that photo of cast projectiles above you need to remember that these are 1/2" in diameter and the little guy on the left weighs in at 450 grains while the big dude on the right tips the scale at 725 grains
For further comparison, here is a 725 grain 500 Smith and Wesson wadcutter shown next to a 250 Federal Core Cast 41 Magnum hunting load. That 41 Magnum looks fairly tiny
While the 500 Smith and Wesson revolvers only hold 5 rounds, if you touch off 5 of those big wadcutters at full power you are sending in excess of 1/2 pound of lead downrange at roughly 1100 FPS
Now, if you are not a hand loader, there is much more appeal to the versatility of owning one of the 460 S&W Magnums over the 500 S&W Magnum as several other Forum members have pointed out.
To me that is not a selling point since I do not believe in shooting short cartridges in Magnum firearms. I much prefer to down load the full size brass to what ever levels I please. This obviously avoid the cleaning concerns due to the ring that builds up just adjacent of the case mouth