Reccomend an integrated tube Amp-under 2k

I've got some good advice from this forum, so in that spirit I would like some ideas about getting a new integrated amp for my speakers.

The speakers I have are VMPS QSO 626R:
Mid: - 280 Hz - 6.9 kHz
Treble: - FST, 6.9 kHz - 30 kHz
Impedance & Sensitivity:- 8 Ohm (5.6 min.) 90 dB/1W/1m
Power handling: - 150 W rms /4 Ohms, 20 W min.
Frequency response:- 42 Hz-25 kHz +0/-3 dB

I have already an integrated tube amplifier: Melody SP3, modified with Mullard and TungSol tubes.
My source is 90% digital music( CDs and computer, via a CI Audio DAC).
I feel that I don't get the full potential of those speakers with this amp, so I would like to "upgrade":)

My budget is something under $2000.