Can someone help me choose?

[Meister]

A little bit of advise:
Don't buy expensive FX lenses for your D3300. Get quality DX glass.
Not many folks know this, because it is counter intuitive, but FX lenses will be less sharp than DX lenses on crop bodies like your D3300.

The D3300 is imo a professional dslr in a light 'consumer' body.
It's an excellent choice.

 

[Policar]

So being paid to shoot when a client needs you there at a certain time leads to a lazy mentality like mine? Weddings, magazines, portrait sessions, etc... when you're working on a client's schedule and they can't all wait until just after dawn or just before dusk?

You know, not everyone is a landscape photographer and it certainly doesn't make you lazy if you're shooting on a client's time instead of your own.

I've seen examples of wedding photographers shooting outside in bright sun that give you a choice: overexpose the sky and light the sunject, underexpose the subject and light the sky, or go pull out the big strobes, modifiers, and batteries and make your subjects wait even though you're on a time crunch. The reason I invested in the D750 is after seeing photographers properly expose the sky and underexpose the subject just to push the shadows in post to get a properly exposed sky and subject and no one uses tone mapping. The camera is that good. It's another tool that allows you to land amazing photos and that is being creative, not being lazy. Having the tools and not using them is lazy. Delivering photos to clients that are mediocre is lazy.

These look ****?:
https://farm3.staticflickr.com/2949/15415572896_71ca78e586_c.jpg
http://www.slrlounge.com/wp-content/uploads/2014/10/32-Nikon-D810-Review-Images.jpg

They look a bit tacky to me, but I'm glad your client likes them and can see why. They're much better done than a lot of similar shots, but they'd be nicer still lit properly with strobes or reflectors under better light in the first place. Second one is nice, you have a good eye, just not my style.

That said, they're clearly tone mapped. The sliders in photoshop apply tone mapping, just more subtly than HDR suites. Amazing DR from the D750, though! The oversaturated sun look garish in the first, but knock it down a bit and it could be fine, too. Nice work overall!