Anything using Micron D9 memory chips should do.
Crucial Ballistix/Tracers 800-1066mhz
Corsair Dominator 1066
Buffalo Firestix 800+
Most 800mhz sticks using Micron D9 chips should overclock to 1066.
I bought 1066's because rebates made them cheaper then 800mhz ram.
BTW what are the specs on your E4300 overclock? Volts, fsb, multiplier, cooling, etc?