Although ABC warehouse http://www.abcwarehouse.com/ is a bit pricey, they have a very good selection of televisions. They have every type of tv, from portable to really big 72" televisions. They also sell other types of electronics along with laundry machines, refriderators, stoves, computers and other items.
Whenever we go in there, there is always a store representative ready and willing to assist us even if we are looking at items for a later purchase.
We have even received discounts at a later date. I have never had to return any products after purchase due to their products being of higher quality.
Within the next year, we are planning a bigger upgrade on our big screen tv, and we are planning on making our purchase from ABC Warehouse.