I'll preface my response to how the bikes relate to me. I'm 5' 5.5" (I'd prefer 5'6"), about 165. I ride 90% back roads and mountains and primarily a 3 season rider. Rarely commute to work (2-hour round trip on slab, no thanks). Riding since 1978. My pace is brisk, but my knees stay in :)
There are plenty of things I loved about my 5th Gen; V4, sound, comfort, unique looks, SSA, Honda fit/finish. What I was not enamored with was:
Dated min spec suspension (small conventional forks and ok brakes, dated components)
Lack of hard side cases for touring. Had a top case but I always hated the look of a top case.
Seat height, combined by seat width, made two-up riding a careful proposition at my height
Weight - I felt it's heft everywhere, especially not being a normal size gentile. Don't know if it CG was high or what, but I never was comfortable pushing the bike in the corners either.
Power - Plenty of it once you drop down two gears; somewhat lethargic if two up.
Where the VFR had weaknesses, the ST3 addressed:
43mm Showa USD forks with proper spring rate, 320mm Bremos (better braking). Suspension components are robust and light
Hard matching panniers
Seat height, though roughly the same as the VFR, the saddle and bike is much narrower; I can easily manage the bike, even two up.
Weight - boy it takes the CIA to get a "real" weight on bikes these days, but SportsRider did a comparison test with the ST3 and a 6th Gen VFR and the tested weight was almost 60 lbs lighter than the VFR (both with bags). I can testify that I could easily tell it was lighter - both maneuvering it and riding it. (as a sidenote, the 1st generation ST2 and ST4 were 30 lbs heavier than the 2nd gen). As far as handling, it rails with me on it. I pushed past where I would take the VFR and felt more comfortable in doing it. In about 1 ride.
Power - 1000cc twin vs 800cc V4. The Duc has a little more peak hp, but tons more torque. It's a roll-on monster compared to the VFR. It also sounds glorious.
Parts - Used and new parts for the ST3 are more readily available; The VFR can be problematic at times.
ST3 weaknesses (for me):
Most ST owners love the stock 2nd gen seat - I hate it after 1 hour (too soft). I have a Corbin butt, so a Corbin is on it's way.
Tried it first with the stock handlebar risers - way too much weight on my wrists with my short arms. The Helibars made a huge difference and is a must have in my book.
If you are a large human, the leg room may be an issue. It feels tighter on the ST3 than the VFR.
Issues where the jury is still out:
Is this thing going to strand me?
I like working on bikes, so hopefully the maintenance won't make me swear and scare the kids
The back end of the bike is, well, plain. No SSA, no sexy wheel to show off
Is this thing going to strand me?
As a former VFR owner, I would not make the switch to the Duc if:
I had a shop maintain it, or
Hard core commuting
Anyway, that's my opinion on the hot new red-head I have in the garage.
Scott L.