My experience:
Multibit: My (now my daughter's) Bifrost went through 2 upgrades to Gen 5 Bimby. I've loved my Yggy since I got it, now on the queue for the uber upgrade to Analog 2+Gen 5. From trustworthy sources (which I cannot link to for reasons), this will also be a valuable step up. I own two other very good DACs (Holo Spring KTE 3, Soekris dac1541), but the Yggy is my reference.
Tubes: I thought tubes were a retro affectation (like vinyl
) and stayed firmly on solid-state land until I was tempted by the Lyr 3 (with new Tung-Sol tube). Wow, this little amp holds its own and more against the 2.5x more expensive Neurochrome HP-1, which had replaced the Jot I gave my daughter with the Bimby. If I'm not careful, I'll be tube-rolling anytime now...