Joe,

when you say "stay in tune", are you talking about the strings not staying taut? or do you mean intonation changes as you go up the neck? They are different problems that require different solutions. Intonation problems wouldn't be helped by better tuners.

Having said that, I agree with Bob that if you like the guitar, a better set of tuners would benefit.

The local music store should be able to set up the guitar and take care of the intonation problems for a reasonable fee.

My personal philosophy is not to spend a lot of money replacing stuff on instruments. I'd rather sell it and buy a better instrument. Its kind of like buying a car at a used car lot as opposed to buying all the parts at an auto parts store, then assembling the car yourself. Assembled mass produced items are generally MUCH less expensive than the same item made from individually purchased components

https://www.dropbox.com/sh/ey71h8ep047758h/AAC12jNM0Hz9Q8zsh5iDeqNHa?dl=0