WELCOME One1world
I had a stick of pny 2100, 256 mb, a while back. While running in tandem with a 256mb stick of kingston, I didn't get good results.
Alone, the kingston handled cas2, as well as the rest of the turbo timings. I can't say the same about the pny. I also got it on sale at compusa.
Without going into more detail with numbers that i'm kinda fuzzy on, since it was a little while ago, I'll tell you that pny is NOT generally a good brand for oc'ing. My memory benchmarks didn't improve at all with the pny. It's not a good idea to mix brands, and it's best to use one stick of memory (like 512mb instead of 2x256mb).
If you want performance, don't skimp out on the memory, as it's one of the most critical components of your system. I suggest some corsairXMS or crucial.
*edit*
If you shop right, you should be able to find a KT333 mobo for about the same price as that 8kha+, and the difference between 2700 ddr and 2100 ddr prices isn't too much. Also, the 1800 t'bred will oc better at lower voltages than the 1700 tbred.