The best steakhouse i've been to so far on long island has been
Brooks & Porter in Merrick, NY
lugers in Great Neck was pretty nasty for the reasons that the waitstaff sucked, the place was filthy (a waiter dropped a broccoli on the floor and looked around then kicked it under a chair that it fell near). (My steak came out wrong 2x (asked for rare - med rare, first time came out completely cold and purple, 2nd time came out well done, then they got it right)
mortons isn't anything special
i still want to try burton and doyles as I heard that the steaks there are amazing. anyone hear anything about them?