Ok, I'll be the one to address the big ass elephant in the room, not that I really wanna be that guy, but enough is enough already.
This fellow has flip-flopped 1,001 times before he even got the unit, had it for a few hours, realizes it's way above his head, (like we didnt see that coming) and we're still trying to convince him otherwise, while he's trying to convince himself of what I'm not even sure anymore.
The bottom line, there are literally 1,000's of VERY talented artists that swear by Fractal Audio & have NO problem dialing in some of the most beautiful tones in ANY genera of music. I do not see any of them using a Cube. Not that you couldn't but by comparison, there simply is absolutely no basis for any kind of valid argument here on earth or in this solar system, galaxy or universe, period. You can try & convince yourself all ya want, but there obviously is some other issue at hand.
Either your in over your head, spent too much for your musical abilities, (which I'm sure we've all been guilty of at one point in time), or some other issue.
You've had more than enough reassurance, guidance/advice, seen more than enough vids & heard enough clips to know the capabilities of the unit.
Don't blame the unit, when it's user error & IMO a total lack of trying, not to mention expecting it to sound great out of a Cube.
Glad ya got the monitors but ya already gave up on those? Cause you didn't sound like SRV? can ya play like him? I mean do you know how to get that SRV tone going with your pick dynamics and how you dig into the strings, heavier strings help a lot coaxing that vibe out. Just a few questions, things that I had to learn while I was buying tons of different tube amps & guitars back when I was in search of nailing that "holy grail" of blues tone back in the day. What I learned it's not really the gear, sure it makes a difference, but that tone I guarantee is in there, IF you know how to get it, but the box ain't gunna do it for ya, no gear will.