I workout late too. I prefer to get my post workout shake in and then get a real meal before bed. My post workout is straight whey so it is pretty quckly digested, leaving me nothing to carry me through my sleep. usually will ahve a can of tuna and some cottage cheese before bed. If you are worried about fitting both in, here is what I do. I drink my post workout out shake while I am still sitting in the parking lot of the gym. By the time I get home and get showered, I'm ready to eat a quick meal before bed. This works well for me.