I play an Alvarez-Yairi CY118 Classical made in 1990. Beautiful tone.
I installed a B-BAND A6.2 XOM pickup/preamp system in it myself a year and a half ago. GREAT SYSTEM! Tops everything I checked out.
So look for one with a B-BAND system built into it.
The INTELLITUNER is a tuner that works off the vibrations of the wood, and temporarily clips onto your headstock. That's the BEST way to go.
And let me say this. For tuning, don't just tune each string to the tuner. THAT does not mean the strings are in tune with each other. (HARD CONCEPT TO EXPLAIN...)
Instead, tune your D (4th) string to D.
Then, by sounding the harmonics at 5th fret A string and 7th fret D string, tune your A string to the D string.
Sound the 12th fret harmonic on the low E (6th) string, and make it match the fretted note of E at the 2nd fret on the D (4th) string.
Now, your E-A-D strings should be nicely in tune.
Sound the 12th fret harmonic on the D string, and tune the 3rd string, 7th fret to this note.
Now again sound the 12th fret harmonic on the D string, and tune the 2nd string, 3rd fret to this note.
Finally, pluck the 6th string, 5th fret harmonic, and tune your open 1st string to that.
This is THE BEST tuning system for CLASSICAL GUITAR that I have found in my MANY years of playing. That said, it does NOT work the same for electric guitars due to the compensated bridge...
I play my Classical thru a BOSS GT-6 for effects, into a MARSHALL AS100D Acoustic Soloist amplifier. VERY SWEET!!! I tried MANY acoustic amps, and read MANY reviews before buying this amp, and I do NOT regret it at all!!!!