Hi Saviourwin, in respect of the Jadis DA88s, before thinking seriously about that option, first have a read of a service report from renowned Audio Engineer Dallas Clarke (www.clarkeaudio.com). Once on the site, click on the "service" menu option, then scroll down to the write up entitled "Defy Logic". Enough said. In regard to Cary, I dont know a lot about their gear, however if considering a 15 watt SE triode amp, also have a look at a terrific amp which Dallas designed in consultation with Vactron in Australia - the KT88SEB. The KT88SEB is a 15 watt pure class a SE triode with some pretty hefty trannys on board ($4k new w/5 yr warranty). You'd be ordering from Australia, but the US dollar is stronger to the AU & Dallas's work is superb. He has been working on tube amp designs for over 20 years. (I offer the disclaimer that I know Dallas, but I can unoquivicolly recommend his work & great service).
The Cary six packs look like a bargain & obviously have more power, so no surprise it's a class a/b design at that pricepoint. I dont have any personal experience with them however. I couldn't find any information on the MC2775. Is that a Mcintosh?