Ritek media is among the best of the cheaper media for price/performance. Stay away from the seemingly generic Ritek (i.e. Shiny Tops etc). If you can find anything branded Ritek or RiData it is usually the best and sometimes referred to as "Grade A" Ritek.
Overall, it's better then 90% of the other cheap media.
The only media I recommend over it is Taiyo Yuden (TY), Mitsubishi (MCC) and Maxell (MXL).
Have a search/look around the media forum and I'm sure you will find allot of useful post/info.