Agree the Rogue would not be my first choice for a tube like sound. It's also not priced that much above the NAD stuff, so may not be a huge improvement. KT88 tubes are the least tube like as well.
Best I can offer is with SET EL34 or 845 output tubes, the Harbeth's are magic. You might look a the Mastersound dueVenti (el34, 20wpc) or the Unison S6 (el34, 30wpc.) Either of those would move you up a to a whole new level.
If you are sweating the tube thing, the Pathos Classic One MkIII hybrid or one of the Unison Unico hybrids would also be a great match.
Best I can offer is with SET EL34 or 845 output tubes, the Harbeth's are magic. You might look a the Mastersound dueVenti (el34, 20wpc) or the Unison S6 (el34, 30wpc.) Either of those would move you up a to a whole new level.
If you are sweating the tube thing, the Pathos Classic One MkIII hybrid or one of the Unison Unico hybrids would also be a great match.