I can highly recommend Audio Research PH3, a tube phono preamp which I once owned. There is one currently available for $825 which is a bargain compared to what I paid. It uses 3 tubes from 6DJ8/6922/7308 dual-triodes tubes. There is a lot of NOS tubes options for this family and tube rolling can become addictive! Yes it is bit more expensive that your allocated budget, but you will be well rewarded for your extra $.