Gas grills are surely convenient.
I have a Weber Genesis and I LOVE it. Since you already have natural gas or propane at the house, it's a no brainer to plumb it into the house. Just realize that they sometimes need a bigger line than you think otherwise your grill will never heat up to proper temp.
As far as burgers, never did find a packaged burger that was up to my standards.
Use 85/15 or 80/20 ground beef. Add some chopped onion, chopped bell pepper, chopped fresh mushrooms, salt, pepper, Worcestershire sauce, and spicy mustard to the meat, mix it all up, and form up some patties and you will never have any complaints.
For buns, grab some fresh baked buns from the bakery, or fresh baked Cuban bread, slice into burger sized buns, butter them, sprinkle with garlic pepper, and toast on the grill. Makes a nice garlic toast bun that everyone loves.
Tips to cook burgers:
-High heat, 500+
-Flip only once, never more than once, usually after about 3-5 minutes
-Don't squeeze down all the juices with the turner
-MUST buy a digital thermometer, so you dont just overcook for 15-20 minutes.
-Meat continues to cook for a few minutes after it is removed.
-Most pro's recommend a 5 minute rest before eating to allow juice to settle and meat to finish cooking.
-Thus, you can remove it a bit sooner than your preferred temp as it will continue to cook.
-USDA recommends well done at 160 degrees
-Most pros recommend 140 degrees for medium and 150 for medium well
