Who is
he, brother?
Firstly, you must realize that there is a diff betweenn
tweaking and
repairing. Tweaking is slang that usually denotes modification to enhance performance. If the tweak is successful, it should ideally sound better than the 'stock version'. If it sounds better than the stock version, it probably is, provided it doesn't heat up unusually while sounding better. In this case however, you will not be able to compare unless the seller has one amp which is tweaked while the other one is stock.
Secondly, read this line deliberately again from post 3 above.
"I mean its better to go in for a technics, pioneer, kenwood and the like rather than relatively lesser known amps."
But do remember that some great manufacturers have made lousy products though the converse may not be
so common, but it has happened.
I am not familiar with the particular technics amp that you talk about in the other thread. Googling it may lead to further insight. Also, very often, ebay/audiogon prices are usually a good indicator of the component's popularity and reputation.
Read this
How To Find and Buy Used Audio Equipment Guide | Audioreview
How To Find and Buy Used Audio Equipment Guide | Audioreview
Next, don't worry and upset yourself as it takes some time before, as a newcomer, you get used to forum rules, courtesies and traditions. It happened with me too, much worse in fact. All part of the wider learning process and
MUST be taken in that spirit alone.
Regards