If the grates and flavorizer bars are still functional you won't see much, if any, gain by replacing them with stainless parts. Grillgrates are another story, and they would give you added functionality and improvement for some cooks.
You can do two zone cooking on the Akorn, but you need to buy a grate to raise the level of the charcoal up to sit on the tabs in the steel bowl. When look at the Akorn you'll see what I'm talking about. IIRC I bought an 18" weber grate that fit perfectly.
The uncoated cast iron grates have...
I had an Akron and it leaked horribly, but others have had much better luck with them. The Akorn ash pan is a rust-away item you have to order directly from chargriller. If I were to buy another kettle style grill at that price point I'd go with the 26" weber kettle.
I love bulgoogi! What sauce or recipe did you use. I made it so much a few years ago my wife got sick of it.
What a great find on the curbside genesis.
Congrats. You'll get a lot of good food off of that grill.
Weber includes a grill cooking card with their grills, which works great. If you didn't get one, you can print a copy from the link below. Just make sure you use the Genesis card...