I haven't hear the Magnum Dynalab, so can't help there, but I currently own the Pass INT-150. A family member has the Verity Parsifal Ovations, and I'm very familiar with them. I briefly owned the Verity Fidelios, which I had hooked up to the Pass. I haven't heard the Audia Flight gear, but have read about it.
I would first off say, that if you light Audia Flight's gear, you might as well try their integrated amp, which I haven't heard. I mean, if you like their house sound, stands to reason that it would be an easy adjustment, and you wouldn't be in danger of trying a bunch of different things.
I love the Pass INT-150. I did a shootout between the Pass and my old Aesthetix/Bat combo, as well as the aesthetix with a Pass 250.5 and the Pass INT-150's pre (the x-1, basically) through to the Pass 250.5. The Pass was preferable to the Aesthetix/Bat combo, and only an iota less fleshed out than the aesthetix/pass 250.5 combo--not enough to justify the price difference, in my book. The Pass is very well made, has two sets of balanced inputs, which is nice, and a very study and useful remote. The sound is extremely dynamic, with excellent imaging and snappy bass. Even my friend who brought over his 250.5 said he thought the integrated was the way to go. It should easily drive the Parsifals, and I think this would be a very good combination. I find the Pass very neutral, and very revealing of cable changes, so I can tune as needed, but still am trying to stay very neutral. Personally, I love the looks of it: very understated and handsome, with the added bonus of being able to turn the display off. My wife tolerates it, but I think the only gear she would like the looks of is McIntosh (she's a retro gal). I'm thinking of auditioning the McIntosh MA7000, just to humor her, but truth be told, I want to stay with the Pass. THe Pass sounded great with the Fidelios, but they were too small for my main system, and my wife nixed the idea of them in a second system. Bummer.
I've listened to a ton of integrated amps in the last few years, so email offline if you want to know more.
cheers,
matt