We have stayed at the Shelburne twice. The first time they gave us an incredible upgrade to a two bedroom suite that was very nice in all respects except that it was on the second floor. The street noise was really disruptive to any sort of good night's sleep.
The second time my wife did not like the one bedroom. I forget why and they accomodated us immediately to another room that was also very nice.
In both cases as I remember, there were Queen size beds. Very comfortable.
We have not gone to the Loew' s one yet but hope to shortly.
You will enjoy the Shelburne but understand that it is several blocks from mid town. YOu will need a cab or very sturdy shoes to get to the "action".
Have a great time.