I have a TWO.2 with Auricaps and use a Grant Fidelity Tube DAC-09 as DAC/pre-amp/tube buffer, my sources are Squeezebox Duet, Piano M1 CD Player, PS3 Blu-ray and gaming. I have not heard a Sensation with Tube Buffer but with my current setup I enjoy the versatility it offers. I am sure that any Virtue Amp with a tube buffer of some sort is a winning combination. You might try adding one of the various tube buffer options available as most seem to be just over $100 and you'll be able to swap out the tubes and tailor your sound for the small price of a vacuum tube. Thats when the fun really starts, new tube equals new sound and there are a bunch of tubes you can try in whatever size you need. Enjoy!!!