Dont know about the best rajdhani but I will support ICF over LHB. ICF may not be able to attain greater speeds but it atleast dont give sudden jerks to pax. The jerks are so bad that it can hurt you. With an normal ICF smooth journey can be obtained as well as if it is kept at 110k's regularly then its enough for a raj. Surely LHB looks great but ICF lets one feel that too !!