A couple of things.
1.) "Hyundai" makes RAM? Enough said.
2.) What Motherboard do you have? If you have the MOBO manual it should tell you what RAM it supports natively. You're running 333MHz with PC2700 right now. But, your MOBO might support up to 400MHz which is PC3200. If it doesn't support 400MHz then you can still buy the PC3200, it will only operate at 333Mhz not 400Mhz. If your MOBO does support 400Mhz and you run your PC2700 at 333Mhz with the PC3200 at 400Mhz, they will both only operate at the lowest 333Mhz in a dual channel mode. Assuming you are going to run them both.
Buying the PC3200 is probably your best option at this point even if your MOBO won't run at 400Mhz. You could at least use this in the future if you ever build or upgrade ths PC.