As far as achieving an exact tone for a particular cover song, I gave that up 10 years ago.(Been playing Lead guitar/nothing but Classsic Rock for 20 years) I found that unless playing for an exacting cover band, it's best to acheive your own tone with variations for different song types. I've exclusively played both a Strat snd a Les Paul the whole time. I started with a Garnet open back 40 watt bass amplifier in the early eighties and got sucked into the solid state era and went with a 65 watt Peavey studio pro - it was a series of futile experimenting with various effects for the next 10 years trying desparately to fine the sound I could be satisfied with - solid state sucks...
Then 10 years ago I got lucky and played thru a old Fender Champ (low wattage single ended class A tube amp) at a friends place. This was the first time I could remember actually experiencing "Tone", but how to achieve volumes for gigs.
After some experimenting (not near as much as before), I aquired a 1978 Hiwatt Custom 100 head and built a open backed cabinet with 2 12" 75 watt scorpian drivers. I definitely achieved the killer volume needed and this amp will "break-up" nicely at excrusiating dbs but leaves no variation for different songs. I soon discovered Tonebone's Classic preamp tube driver and my problems were solved. With this setup I use absolutlely no effects (not even reverb, the Hiwatt doesn't have), all the variations I need is coming from guitar/pickup/tone selection and enabling the tonebone or not and of course pick attack.
I recently got lucky and picked up a 1967 2 watt single ended tube amplifier for $65. It actually can drive the cabinet I built to volumes I've actually rehearsed with.
The perfect practice amp with the Tone that the little Fender Champ showed me in the first place.
Bottom Line - looking for tone - find your own.
- a means to your end - try a "Single End"