For a DIY person differences in panel quality or warranty may not be as important as your picking up the panels to save shipping and if there is a panel issue down the road just replace the panel with possibly a different brand etc.
I had a future planned trip through LA and with a small diversion picked up my panels. That store which was very popular on this board no longer exists. Even if the mfg does exist the panels were rebranded (I knew this)... But no problem as I'm ONLY in year 5 of my 25 year warranty...:S
Of course one can just raise their CC but that's not me.