I've heard good things about Primo grills too.
One thing you should be aware of - the purchase price is just the start of it
Then there are different grates (the cast iron one is a must to take advantage of the BGE, as is a "plate setter"). You'll need a stand/table thing. I made one, but you can buy them too. Then there's the fuel. You should not use briquettes, just lump wood charcoal.
At the end of it, you'll have spent a fortune. And enjoy fantastic meals for many years. Ribs that have been smoked for 5 hours are absolutely delicious!