since you are looking for two hotels, one should be either main street station or california. both are the second nicest downtown (in my opinion), behind the obvious first pick of the golden nugget. they are also good for easy future comps. between the two, there are plenty of really good food choices. california has a 24-hour coffee shop, something which seems to be dying downtown.
the second hotel - golden nugget is (again) obviously the best hotel downtown. but if you arent looking for something that fancy, my next choice would be the el cortez - your choice of tower or cabana suites. i prefer the tower, but the cabana suites (which arent even real suites) are the supposed nicer rooms. i hated my cabana room. why the el cortez? the rooms are nice, despite people who have never stayed there declaring the opposite. you really get a lot of mileage with your MRB there. i believe theres a room rate coupon in there, free slot play and a coupon for the flame, which makes dining there a steal. the coffee shop is also good and cheap. comps are easy here too. as an added bonus, if you are staying there on your last night, you can also get a free shuttle to the airport the next day.
the plaza has hit or miss reviews, i dont want to suggest it as i have not stayed there post-renovation and i dont like to give my opinion on anything i have not experienced myself. for the same reason, i am not recomending the new rooms at the d, although they do look fantastic in pictures.