Gold Tip's the way to go
I've done a lot of business through Tabe's archery in Shawnee Oklahoma. They've found that the HC arrows are fine as far as spine goes but the side wall durability is terrible. They've since switched to the Gold Tip target line of arrows. (600) They don't have as much spine to them but they do have decent side wall strength. That being said, you still don't want to shoot the same target as a slap from another arrow could cause problems.
Now to throw my $.02 in on the speed thing. Have you ever been faced with a deer at an unknown distance? You just know it's inside of 50yards, what to do? I simply bracket the chest cavity with my 30, 40, and 50 yard pins and smoke him. Can't do with a 280fps bow.
Now for the noise issue. If a bow is too loud do whatever it takes to quieten it down. This might mean a combination of things. On the other hand I find it hard to believe there is any bow out there that a deer couldn't hear inside of 50 yards.
I've seen a Iron Mace shoot 420fps and it's not as quiet as some other bows doing 280, but with the mods done to this bow it's as quiet as most.
After all, if a deer is high strung, chance are he's going to jump string. This is with any bow out there, 420fps decreases the margin of error.