Xfi Xtreme Music of Gamer?

[MuSsEr]

Getting a new sound card for my wifes PC, going to get an Xfi but can't remember which one is better, the Extreme Gamer or the Exteme Music ?

I remember when they first came out there was one of the Xfis which was a deinate no no as it did not come with the onboard memory

Is that either of these ones or is it the cheaper one?...the Extreme Audio

If its not one of these, whats the difference? Since they are priced quite similarly

thanks