I'm kind of on the wall on this issue. I have six cats; five inside and one outside. Two have their claws. I have had no problems with my cats that are declawed; they are the happiest and sweetest ones. One clawed cat is inside the other is outside. The one outside is outside because he was a stray that took to my dog; they are best buds. He has all but destroyed her wooden parts of her hutch with his claws though. There was no need to remove his claws; plus they keep the husky in check if she wants to play too rough.
The inside clawed kitty had a rough start, came to the clinic as a wee 4 week old bobbed tailed with minimal anal tone. Well I got him all better and he is 100% 1 year old. Since we were not sure he would survive, declawing him was not even a thought. The only reason he still has them now is he hasn't harmed any of his roommates. He has scratched some stuff, but its only materialistic things.
I also had a cat (snowball) when I grew up that was a stray that came as a four paw declaw (we didn't have the declaw done). He was amazing. He could climb any tree and could catch anything (mice, squirrels, raccoons, possums, birds, etc.) I remember one morning I was out on the front lawn and out of nowhere he came flying up into the air and caught a bird.

He passed away at 17years old, maybe older; he lived outside his whole 15 years with us, but once he went into renal failure, I wasn't about to watch him wether away. He was one great cat.
From what I have seen as a vet intern, the younger you get it done the better, be it a declaw or dewclaws on dogs. From my count, half the cats that came in are young ones and done as a precaution to potential damage. The other half are older cats that are with the elderly clients or cats that are polydactyl with ingrown nails. Owners that come in wanting to declaw due to behavior we advise them to try clipping them or have us do it, but if they are completely out of control we would rather declaw them then fight them every couple of weeks completely stressing them out and really applying emotional damage.
But with all that said and that was a lot, it’s your decision. Try clipping them first or use those caps, you can always declaw if all else fails, but you can't reverse it.
This is just my thought/opinion; take it as a grain of sand.
Good luck.