I second Jond's response as it has been my experience as well. A tubed pre-amp is easy and economical to maintain and generally speaking the heat/ventilation issues associated with a tubed pre-amp will be minimal. As an example a used conrad johnson PV10b can be had here for around $750. There are other choices as well if that doesn't meet your requirements. Your choices for a tubed CD player are limited especially in your price range.
Chuck
Chuck