Dawg,
I have a '09 SERG and love it.
I'm tall in the saddle and I've not noticed any gauge placement issues. My previous ride was a new '08 CVO SERK that I changed over to a standard Road King windshield. Just with the windshield attached to the frontend, my side wind gusts rattled me around quite a bit. The SERG does not share that same trait and side wind is a LOT less noticeable. I would say that the Batwing and the RK would be similar in strong side winds. We ride along the Mississippi quite a bit and some times the wind is VERY strong. The SERG is much better.
I will admit that mine is a two generation old design. My fairing and the '11 or '12 fairing are the same, but the height and angle is slightly different. And then the '15 is even more changed with the multiple vents.
I had quite a bit of trouble "fitting" a correct windshield and ended up with a CeeBailey recurve that seems to be pretty good for us. I'm sure that a Batwing is a lot easier to fit with a windshield to.
I'm sorry but I still love my Shark and would not go to a Batwing.
If anyone out there wants to ride a "heavy" frontend bike, just hop on one of the older bikes like my '76 FLH. If you let go of the handlebars in a parking lot the bike will fall over, I mean literally fall over as low speeds. You have to man handle it all the time until it gets up on plane so to speak in boating terms...
The old FL series had the fork tree bearings behind the forks just as any of the other bikes of the day. But the newer frames probably starting in the mid to late '80s had the tree bearings in front of the forks.
I remember that when I had my '76 FLH out and stopped by Doc's Harley Davidson in Kirkwood MO for a factory test and ride day, the first time I took off with the Road King it felt like power steering. This was in '07. After a 10 mile ride I had to get back on my '76 to ride home. I thought I was going to drop the bike right then and there. Boy what a difference it was and still is. I'll be riding the '76 this weekend and every time I get back on the '09 SERG it's like power steering.
Sorry I digress just a bit... Rambling way too much again!

The bottom line is that my SERG feels great at parking lot speeds, light and effortless in steering and feel, not top heavy at all. I'm a big guy and I've ridden my neighbor's '13 Street Glide and it felt a bit heavier in our subdivision.
It boils down to personal preference. Some say the Sharks are a love'em or hate'em look and apparently not as many people like'em as their half brother the Batwing.
I agree, rent one and get some serious miles at all street and highway speed, single and two up.