Its pretty humble indian amp called Norge. (I dont know if they have a website or something)
The speakers are good - Quad.
Anyway, my experience our of all hi-fi shopping thing is - "diminishing returns" is true.
And you need to limit yourself to available cash in hand, rather than listening and heeding advice of every audiophile equivalent of "tom, **** and harry".
And there is a whole world out there other than BOSE and ONKYO.
If creatives sounds good to you. Then they are good.
Now coming to plugging the guitar to a 10K hi-fi system.
I wont advise, since the speakers as well as amps are technically not so robust to handle the sudden wide dynamics.