Re: Oh how the plot thickens!!
They seem to be a decent, good looking boat with a pretty good reputation, as well as coming from a good designer.
Nothing you listed sounds like a fatal flaw. It would be a significant upgrade from your Tanzer, obviously. It doesn't sound like the trailer is a ramp-lauch type of trailer - more like a flatbed with stands on it? If so you may need a hoist/crane to put it in the water.
If you can afford to lose the money you'd pay for it, then hey, give it a go. I wouldn't go in with the expectation of actually getting your money back if it doesn't work out for whatever reason.
Finally, if weekending and cruising is in the plan, you sound like a pretty big guy.. make sure you'll be able to sleep aboard in relative comfort and move about in the boat without hassle. I imagine it doesn't have full headroom so take that 'bending over' into account if you're thinking about more than just daysailing.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)