I don't think having the power and the tones would give you that much of an advantage.
I do think that having a varity of tones/effects can help make the repetiveness of practice a little easier.
Maybe check out one of line 6 PODS. I have a Line 6 pocket pod and it fits the bill for me.
Like you said, " you just need to nail the notes " And your real investment is the time you put into your music.
This is my opinion so hopefully you'll get so advice from so more experienced players.
Good Luck and pratice long and hard...