While I echo what others have said re lounge access don't worry too much about Delhi these days - T3 is a lot better than T2 used to be, especially the international area. There are plenty of food outlets, Costa Coffee and the like as well as bars serving reasonable hot food and a beer, unless you are unlucky enough to be travelling on an Indian bank holiday when the whole country is dry. There certainly is a transit hotel and there is also (I think) a paid for lounge. It's also a lot quieter than Dubai and probably in my mind better than Abu Dhabi (though I've only been before the midfield terminal opening). T3 also has very good though not particularly cheap duty free-picked up a bottle of Islay gin there last week.