Hi Buffy,
These are all excellent choices; have owned an XT and paddled a V10 Sport Ultra at length, an Evo for a short time, yet never the Mentor. Buuuuut, just to confuse things a bit more, maybe throw the Huki S1-R into the mix. I've owned one for about three years now (in addition to a V10L, Legend, etc.), and it does everything well.
I see you're doing a mixture of river, ocean, etc. The Hukis allow you to swap out rudders in thirty seconds or less, and Pat from Onnopaddle's work of art P-41 overstern rudder just drops right in to a pin hole at the back for the really shallow/rocky stuff. Plus, at Huki, you can have Jude build you a boat that's as light, or as bombproof as you like. His build quality is amongst the best in the business, and you can put hatches, etc. anywhere for drinking systems, and the like. Yes, I'm a fan, but it's rightly deserved. The R is supremely stable, feels 'lively' and responsive on the water, and absolutely loves big conditions (at least as big as we see them here). The downside is the Hukis tend to be a bit pricier than some of the others, but IMO, in this case your return for your cabbages is well spent. I love this boat.
"Nice? It's the only thing," said the Water Rat, solemnly, as he leaned forward for his stroke. "Believe me, my young friend, there is nothing -- absolutely nothing -- half so much worth doing as simply messing about in boats."
'The Wind in the Willows'~Kenneth Grahame