The actual food choices themselves are good. As far as exact portions go, I guess you don't really need to sweat the small stuff at this point. Right now, you don't need to focus as much on exact grams or calories, but as you lose weight (which you should), you might need to eventually. As Berserker (well...B3rserk3r

) said, when you start slowing down with weight loss, the oats would be the most expendable thing there.
You'll be able to pretty easily see if the portions/amounts are working just based on your weight loss. Slow and steady wins the weight-loss race, and if you can do it eating those types of foods while keeping protein pretty high (as a ratio of protein per total calories) then you'll have done your body and muscle mass a favor.
If you're hungry at times while on this diet, and you seem like you *have* to have something that's not scheduled in a meal or whatever, go for protein, that'll have the least bad (or 'best') effect on both hunger and weight loss. Go for something like beef jerky or a good protein bar (trying to aim for roughly a 1:10 ratio of grams of protein to total calories (ie: 20 g protein in a 200 calorie bar)).
But yeah, overall the food choices look good for weight loss and muscle mass retention purposes. There's inevitably going to be some tweaking required in regards to total food intake (aka: calories) possibly at the beginning, but probably not until later once you start losing a decent amount of weight.
Also remember that as you lose weight, you need less food. Over the course of, say, 60 pounds of weight loss, that'll be a gradual, sliding scale-down of ~700 or so calories that your body will need. So if you're eating at a theoretical caloric maintenance of you at 230 pounds right at the beginning, once you start to get closer and closer to 230 pounds, the fat loss will stall simply because, yes, you're eating the same amount you WERE eating while losing weight, but eventually you reach your set-point. So either you need to re-evaluate your total calories and macronutrient breakdown every once in a while, or you just try and scale back little by little maybe every couple weeks or so. But DON'T scale back too much.
Anyway, you might've already known all this stuff because it sounds like you've already done a good bit of reading and research, but I figured I'd offer it up anyway. Don't hesitate to ask questions or ask for suggestions. When genuine questions come up from people who aren't 'coming in cold', so to speak, nobody minds answering things or offering advice.
Also, just FYI...I lost a good amount of weirght, and I swear once I got to my 'maintenance' level, I was hungry all the time. I think I was used to eating a whole lot that eating ~2100 calories a day was very tough, mentally, for me to do. I really don't know if it was a mental (I just 'handled' it better) or a physical adaptation (stomach shurnk) that has occurred by this point. Now eating at maintenance is fine. But yeah, for a good long time it was tough to not gorge myself. I don't know if you'll run into that problem or not, but if so, it's normal AND it'll go away slowly but surely (if you're like me). I'm just telling you this as an FYI, by the way...