I'm Remodeling My House From 2000sqft To 3900sq-ft And I Will Like To Know What Size Panel I Should Put And Brand?

The minimum is probably a 200 amp, can be more depending on the amount of heating, air conditioning, and large appliances.

Square D QO type, GE THQL,Cutler Hammer , Seimens, are the popular brands. All are good, and there are several other smaller or regional brands that are all good.