Hard to say what to do.
For me, as a beginner to CP's, the stock servos are good enough.
I have a couple of gear sets for when I strip the servo gears.
And now that the servos are available for only $13, that will work for me.
The Spektrum DSP75 is a very close replacement to stock but a little more expensive.

Many have, and you could, go with something like the Hi-Tech HS-65MG for cyclic.
They have metal gears and won't strip as easily.
There are all kinds of better servos for the tail as well.
Again, it's a personal choice.

If you do change the cyclic servos you should change all three to the same, otherwise you will have control problems
due to the different speeds and performance.

Good luck.