Got my 600 to 1007. You should be able to reach 1050 without trouble.
Also, look out for the new Durons with the ANCA code. They <b>may be</b> more overclockable breaking that 1050 barrier.
Read a little about it here:
<A HREF="http://www.overclockers.com/tips414/" target="_new">http://www.overclockers.com/tips414/</A>