If you played computer games, then the answer would be yes, as the 330M GPU is far better than whatever you have at the moment. Otherwise, the answer is no.
If you did CPU intensive tasks like scientific computing or video editing, then I'd suggest you wait until you can get a quad core CPU, but you don't.
For internet, and assumedly some word processing and other light tasks, wait for the next revision of MBPs, and get a baseline dual core with a small SSD. The SSD upgrade will affect your computer experience much more than a slightly faster CPU.
If you want the 13" or move to the 15", or high resolution is up to you.