I don't know your budget so here is a variety to consider:
AES PH-1
Hagerman Coronet
Hagerman Trumpet (one on Audiogon right now with NOS tunes for $1250 - great price)
Mitch Singerman modified EAR 834
K&K Audio (might have been my choice if I didn't get a great deal on a Hagerman Trumpet)
These are all tube designs which I feel is the better option than solid state. Of course your system and budget may dictate otherwise. I'm sure you'll find many excellent suggestions here and you may also want to do a search of the Analog forum as this question has been posed many times previously with a lot of interesting information being discussed.
AES PH-1
Hagerman Coronet
Hagerman Trumpet (one on Audiogon right now with NOS tunes for $1250 - great price)
Mitch Singerman modified EAR 834
K&K Audio (might have been my choice if I didn't get a great deal on a Hagerman Trumpet)
These are all tube designs which I feel is the better option than solid state. Of course your system and budget may dictate otherwise. I'm sure you'll find many excellent suggestions here and you may also want to do a search of the Analog forum as this question has been posed many times previously with a lot of interesting information being discussed.