Getting ready to purchase

I am going to be purchasing a 4gb clip this week.  I was just wondering what you would recomend for an FM transmitter.  I will be buying the clip at Best Buy, and would like to be able to purchase the transmitter there as well (I have gift cards that’s why I am buying it there).  Thanks in advance for any help.

Iriver has a branded FM transmitter that has gotten good (for transmitter) reviews. 

iRiver AFT 100 Mobile FM Transmitter

I have one similar to this one:


I got mine at Target.  And it works pretty good.