As far as the characteristics for grilling and smoking, the Performer silver would perform exactly the same as any other Weber kettle...awesome. You're right, you don't see much on here about that model, not sure why. They're not the nicest looking model, maybe that's what the reason is. One thought about that model, though, you might as well get a Master Touch, or just a premium kettle since you don't get the gas assist with the Performer silver and the table isn't very big at all. On the other hand, a small table is better than nothing and you have the rack below for storing a few accessories.
All that to say, it would work great for you. Whatever you do, since you're on the second floor, make sure you get the enclosed ash catcher for safety. I see a lot of grills being sold on Craigslist because someone moves to a second floor condo or apartment and can't have a charcoal grill. The enclosed ask catcher could literally be a lifesaver for you. Good luck!