I already have it booked for my days for $502 for 4 nights. That's the best price between booking/agoda/direct that I could find unfortunately. But Agoda was being pretty weird, showing a cheap price, then after attempting to book saying it was 4 times what the original price was. Shinjuku's my favorite place to stay in Tokyo personally, but the reviews of the hotel are kinda meh. I also have a hotel booked in Kinshicho right next to the station (the Super Hotel I mentioned above), and right now I'm favoring. It's on the Sobu Rapid and Chuo Sobu lines which give me access to everything I need, but one late night in Shinjuku will cost me about 5000 yen in taxi fares if I miss the train

Also the pickins' for my dates I'm not using points, 12/29-1/2, are very slim at the moment. I'm checking constantly though to see what opens up.