My advice to you: Absolutely do not spend a single penny on a cheaper gas grill such as Char-Broil, Chargriller, Brinkmann, Nexgrill, Masterbuilt, etc. These are cheap, Chinese built, inferior products that will not last but a few years. If they are kept outside, expect them to last even less. There is a reason that a Char-broil grill cost $300 and a Weber cost $1000. You get what you pay for. Have you ever heard of the old expression: "Buy once, cry once"? If you look on CL and eBay, you will see old Weber gassers from the 1980's that are still working well and look great after 30+ years. How many used, 30 year+ Char-Broils do you see still hanging around? None!
I have a Weber Summit S-670. It is the biggest, baddest, gas grill that Weber makes. It has 10 burners. I can do everything with this grill: Grill, bake, roast, rotisserie, fry, boil, skewer, etc. I have every single available accessory you can get for it: Griddle plate, rotisserie, Gourmet BBQ system, etc. It has 10 lights on it. At night, the whole thing lights up like a Christmas tree. It is the only gas grill I would even consider. I will use it for the next 50+ years.
My advice to you is to INVEST in a brand new Weber gas grill. Realistically, it should last you the rest of your life (if properly maintained). If you can't afford a brand new one, then I would suggest looking for a used one that is still in the box unopened. You can usually get these for less than what a store sells them for, but the drawback is that you have to take whatever you can find whereas if you bought new from a store, you can get exactly the style and model you want. If either of these two options don't work for you, buy a good, clean, well maintained used Weber gasser off CL or eBay. They are all over the place.
As far as Broil King, I don't know much about them. I did some research and surprisingly found that they are made in the USA! They appear to be better made than the Char-Broil, Chargrillers, Masterbuilts, Nexgrills, etc. If it were me, I would go with Weber only because I am bias towards Weber and anything made in the USA. Good luck. Keep us posted on what ever you decide to buy.