Welcome aboard! You are talking about getting two bikes, right? So the real question is: How tall is the wife? We've yet to see any of those 350 Meteors on our plastic-strewn colonial shores, but your description of you both having "full licences" leads me to believe you might be in the UK. Normally it would make good sense for touring to have identical bikes--Fewer spares to carry. But maybe an Interceptor would be too tall for your gal? Or maybe you're married to the idea of only using one bike for touring two-up and always leaving the wife's at home?
A stock Interceptor's optional "low saddle" is 790 mm or 31.1 inches high, while a Meteor's regular one is said to be only 765 mm or 30.1 inches. There are, of course, various workarounds such as aftermarket or modified saddles, setting the shocks to lowest settings, etc., but the clearest way to learn which bikes might be suitable for the both of you is to just go to a dealership and both sit on a few. Or who knows? Maybe you'll both prefer the Meteors or want a pair of Himalayans after all. After all, they're plucky and fun and would get you both to the back of beyond.