upgrade to SQ D homeline ?

To completely ignore your question, why do you describe your system as "midfi"?

I have heard few Hifi systems. I hate to say it but they sounded better and were much more expensive.

One of the Electrician is swearing by SQ D Homeline Electrical panel SC2040M200C and saying it is as good for home applications.

Without knowing all of the details, if you are set on Square D,
( I like square D ) go with a NEMA 3R NQ Panelboard. This may be a bit of a stretch for a residential electrician to grasp. You want to insist on QOB ( bolt in breakers, not QO plug ons ) You can spec the interior with copper buss ( CU ). It will cost more than a Home Line load center. I purchase this this type of material on a weekly basis. If you really want to blow his mind, ask him to use "Copper Koat" on all of his connections.
( a real audiophile would insist on an exotic silver paste, but I can not recommend a product that is not UL Listed for that purpose ) The things that you could address are almost endless.

Thanks Mrderrick, it is taking me some time to grasp all the information that you doled out on me.

Do you think homeline panel should be just fine OR should I stick to my original request ( copper bus panel) even if it means keep talking to more electricians?
Btw, I am in no rush and can wait if it makes significant difference.

The Square D Homeline series has aluminum bus and uses cheap branch circuit breakers compared to their QO series.

Square D makes the Homeline series line so they can compete with their residential panel competition.

I personally would not want the aluminum bus.
.

Thanks guys for suggestions. I am convenience to go with copper bus panel only .

I am finding it really hard to find electrician to conform to my request. If anybody knows any electrician in bay Area ( San Jose , CA ) it will be great help.

Stick to your guns and don't let an electrician install a Square D Homeline panel. Go with Square D "QO" or my favorite, Cutler Hammer "CH" style panel. The electricians are also going to give you grief about the 10 gauge wire for you dedicated circuits, but demand it. You may have to pay a bit more to find an electrician to do these, but now is the time to get it done :-).

Absolutely not, I have not put any budget to this thing.
I understand QO panel is more expensive ( and breakers etc) and I fine with it.

I found an electrician to work with, installing CMBE4242B200BTS CH type panel this weekend.