I own a Q300 and a 320. Boy, do I like this series of gas grills. I have used them for steaks, chicken, roasts, pizza, and fish. Using a cake cooling rack, I cooked the best turkey wings ever. I have used it with the rack for some killer beef ribs also. The 300 and the 320 are both the same, the 320 comes with a handle light which is nice if you cook at night, and a warming rack that I seldom use. I bought my 300 new and picked up the 320 used in seattle for $100. The Q forum has a ton of good info about the Q's. If you decide to buy one, use the VWBB page to link to Amazon, they get a small rebate and you will qualify for free shipping from Amazon.com.
Get one and be sure to post some pictures of your great cooks on the Q.