I skated on R3s until I was a regular A team player. Then Thorn took me aside and said she had to tell me something which would really help my skating. I was waiting to hear the secret of being awesome from her, thinking this was the key to glory, and all I had to do was follow her tip and I would instantly skate like Bonnie Thunders.
Then she told me to buy new skates because mine were not helping me.
I went to Double Threat and tried on lots of pairs of boots, then spent an obscene amount of money on boots, plates and wheels.
So R3s are definitely good enough.
Oh, and it turned out I'd snapped the plate on my R3s, which might have been part of the issue with them not helping me
Wheels: I started on Poisons (84a) and gradually worked my way up the hardness scale until I now skate at Withywood on 97s. I rarely go below 97 these days, though the poisons have made a couple of outings recently on slippy floors. Grippy wheels make you feel more secure, but are slower and if you can't plow or hockey stop, try loosening your trucks and/or harder wheels.