What is the sweetest sounding tube amp.

What is the sweetest sounding tube amp $2000 to $3000 range or what is the sweetest sounding tubes I like sweet luscious sound I have a RM9 tube amp now with EL34,S now. I can use KT88,S but i was told 34,s are sweeter.I have demoed a 300b amp by golden tube audio wich was better but i want more. The input tubes on my RM9 were 6dj8.s I swtched to sovetec witched helped alot but i need a sweeter sound