Thanks for the info folks. I´ve been eyeing up the Regal M2 100 ED online. A retailer here in Dublin can get it for me for 1000 euro. I don´t really know why I want it. My current set-up is the (old) Victory Diascope 85mm with a Baader-Hyperion zoom. I really like it, for reasons I can´t explain fully. (I had a Swaro ATS80HD 25-50x, but always regretted losing the little extra push beyond 50x, when I sold my previous Zeiss/Baader).
My rationale is as follows: While seawatching happily recently with my Zeiss/Baader, I looked through an old Optolyth 100mm (TBS, I think), that a fellow-birder had. I liked it. I figured that 100mm objective was doing things for my eyeball that even the 85mm of the Zeiss couldn´t. So I consulted Doctor Google, and found the Celestron. There aren´t many cold, clinical reviews of this scope out there, and no-one seems to have stuck a Baader-Hyperion on it. I e-mailed the guys at Celestron and they kindly and quickly responded, saying any 1.25" astro eyepiece will fit (whether it reaches infinity focus is another matter, but there are "fixes" demonstrated in earlier BF threads for this).
I imagine the Baader-Hyperion will give a wider FOV on the Celestron 100mm than does the supplied zoom ep, and I also imagine a fixed-mag Baader of about 30x would be excellent. It´s a thousand-euro gamble, and I´m rummaging through my optics closet daily to see what I can cash in! (I realise the premium option would be a Swaro ATX 95mm, but even if I had the cash, I hardly do enough seawatching to merit the spend.)