$OEX optons vs emini.


I daytrade the Emini and was looking to open a swing trading account. Since the S&P 100 moves the same as the emini I was considering opeing a options account for longer 1-3 day plays I havn't traded options in 5 or 6 years I was wonfering If anyone out there trades oex options daily or even SPY, I understand all about time value I want be holding overnight much. The overnight margin for 1 emini is 4500 with my broker, but I can get 6-7 oex options and if I short the option I can gain time value as well...any thoughts would be nice..