Nashorn or Waffentrager for 5.7 lineup

[Bootleg Greedo]

So I've been slowly making my way down the german gun carrier line starting basically from scratch (really in need of something with a long 88 for all the 6.7 games I get with a 5.7 lineup), and I'm about to get the nashorn in a few games here, and I'm trying to figure out if it's worth going all the way for the waffentrager (and then sturer emil) or if i'm fine enough with the nashorn for the time being. I know one of the obvious strengths of the waffen over the other TDs in that line is that it has a turret on it, but that isn't such a huge selling point for me at the moment, if I can make the Panther D work, then clearly I don't need a turret to make a tank work haha. But yeah, if there isn't such a huge difference, then I'm probably going to stick with the nashorn for now and start working down the opposite side of the tree to the 6.3 armored TDs so I don't "waste" the RP on redundant vehicles. Also bear in mind that while the sturer emil seems awesome with that 128mm gun, the pen seems so similar that I seriously doubt I'll notice a difference between it and the 88 (please correct me if I'm wrongh here, obviously haven't driven it out myself)

[Proteus]

As you mentioned the Sturer Emil.
The big advantage of the Sturer Emil (over the Nashorn) is, that he has a very good gun depression.
That means that you can leave the bulk of your vehicle behind a hill and still be able to fire an enemies on the other side of the hill (while wih the Nashorn you have to climb more to the top of the hill in order to give off a shot, leaving you rather exposed)

[Rumpelcrutchskin]

Waffle is better then Nashorn, low profile, more mobile, fast turret. Only problem is that every single plane wants to kill you and anything with .50 cal machinegun will be the death of you.
Sturer Emil has the benefit of gun depression but it's also slow and clumsy.
If you play RB then sure I would research the Waffle but when you mostly play AB then I would just go for Tiger H1, Tiger E and Panther D and start researching Jagdpanther to go with Tiger II P.

[Bootleg Greedo]

Yeah I do RB, alright so you guys would say that the waffen is a strict upgrade and worth going for then? Kind of what it seems like as of right now, though honestly since posting this I've somewhat decided to make my 5.7 lineup consist of those three tank destroyers instead of the Tiger Is and Panther D, figure if I'm getting 6.7 80% of the time, may as well only bring vehicles that can reliably pen 6.7 vehicles, and I have not great luck doing so with those tanks