Yup, I'd agree it doesn't exactly shout high quality in terms of fit & finish, and those wooden bits are truly awful (much rather have them gloss black) but there's something undeniably sweet about a small valve amp. It's like the KEL84, the Icon 20PP - they're the equivalent of Bonsai trees to me. Lovely. 
Interesting your comments about the Kolts being volume-sensitive; I didn't play them loud at all (they weren't mine after all!) but the ProAcs although sounding much larger, only really come alive at higher volume with plenty of power going through. They can shout a bit though, and definitely have a voume sweet spot at which point they're wonderful.
Richard.
Round & round bits: LP12/Cirkus/Kore/Herc II/Roksan Nima/Hana EL
Megabits: Bluesound Node 2i/TEAC UD-H01 dac
Making it louder bits: Phonostage: Dynavector P75 Amp: Cyrus 8vs/PSX-R Speakers: Royd Sintra II
Connecting it together bits i/c's: Flashback Premier. Speaker cables: Van Damme Hifi