you can call it being a dick but there is nothing worse than a shop that carries great equipment but does shit work, has no pride in their work, and just flat out don't know what they are doing with that equipment
not saying anything personally about you or saying you are like that ^^^ but if you have to ask about a brand then you don't know that brand and should not be in a position to install, give advice, offer an opinion, sell or install anything from that brand. know the product like the back of your hand first.
if you were just asking just to see what brands people would be interested in from a customer targeting stand point then i am sorry.