That's unlikely to make a difference - the CMI chipset is one of the ones used for onboard sound, so it's not going to be an improvement over what you have already.
The Behringer U-CONTROL UCA202 is their entry level (about R700 retail IINM) - no mic preamps, but that's not a problem for recording direct or if you have a mixer.
http://www.behringer.com/EN/Products/UCA202.aspx