I haven't paddled the 11'7" Shadow but I'm very familiar with the bigger Shadows and other Blackhawks. I know a guy that bought one for his wife and she never used it (I bet the one you found is in good shape). You are big for the boat. You would have to kneel. You would fall out of it while learning to paddle and even with experience there's a good chance that you'd never be comfortable paddling it. The 24" waterline width is narrower than any canoe on the market today except a couple of pack boats and the short length and shallow vee hull both detract from the stability of an already-unstable boat. It would scare the bejeebers out of you in rough weather. At that price you might take a chance and plan to resell it if it doesn't work out but you'd probably have a hard time finding someone to buy it. If you want to put a pack boat type seat on the floor and use a kayak paddle it might be OK. It would feel fast and effortless to paddle since its narrow with very low skin friction.
Baboosic is a nice boat. It's kind of wide so harder to do a proper vertical paddle stroke than many solos. It's a great freestyle boat so lots of fun for spinning in circles and it would be great for downstream on rivers. It has no inherent tracking...it will not go straight on it's own but it will obey the paddle so you can make it go straight with decent technique. People do use them for tripping but the efficiency isn't great so it would not cover distance as easily/well as many solos. It would hold a lot of gear easily.
Most likely the Shadow is too small and the Baboosic is too big so if you have other choices I'd suggest looking for something closer to just right. Of the two I'd recommend the Baboosic.