Live webcasting and saving to disk

Hello-

I have a simple set up - using wirecast on my Sony Vaio LAPTOP a Intel i7 Processor (1,73 GHz) with 6.00 GB Ram and a 64 bit OS running windows 7.

We do live webcasting at softball fields using a pentech device - here is my question. We normally use the medium bandwidth setting and I want to live stream and I want to save to disk. I know how to do the setting for this but I want to know how the quality of the webcast will be effecting if I try and do both and if the "save to disk" version will be a decent quality.

If there is a hardware upgrade that I can do or add to my set up that will help please let me know.

Thank you to this forum for all the help - I have learned so much!