Sorry, ya I guess If forgot a few details. I've had the D3200 for several years, never used it much. Got back into it this year.
I`m sorry to state it, but I would be careful based on this. First start using the D3200 a lot then see if you need more. The D3200 is not a bad camera, I do not think it is outdated.
p.s.: I do this partially to control my own GAS
I only have some basic lenses for it, 18-55 kit lens and a 55-300. So, the banker(wife) says I can upgrade, budget around 5k for camera and lenses.
Many stated you do not need to blow it all in one go. Lenses might be a priority (even if those can be fun), learn and build on your experience.
Start with looking what you miss, what you use most.
I am wanting to do landscape, some macro and in the future maybe some astro night stuff.
Macro: I would say, go for this first. They are great lenses which allow to play with depth of field, you can also use them for portrait.
The question is do you go the 90-105 range or the 150-200 range or is a diopter ring sufficient?
I believe it is worth going for a 90-105 range, this can be manual focus for macro, remember.
Do not exclude wide angle macro, try it first with your 18-55, it could be important to look at minimum focus distance in all your future lenses.
Landscape: the 18-55 is good, stop it down to f8 see if you get stuck on the wide side. Do try some with the 55-300 as well though, tele landscapes are interesting.
I agree I do like the Tokina 11-16 which you can probably find second hand in good state (version I AF does not work with the D3200). However for events I would prefer a newer 11-20 due to flexibility in range, but it pushes you towards DX, where FX is preferred for wide angle.
astro night stuff: have no clue on this, do not do it
All 3 topics do improve by using a tripod adapted to your needs (material weight, carry weight, you length, macro flexibility, stability, etc...) and a remote trigger and for macro probably some filters and light solutions (diffusers, reflectors and flashlights) and rails and extension rings. Do keep a budget for this, you will look into it together with bags to carry your extra material. Do not forget you might want to work on post processing and require a new computer, software, etc ... to use the dynamic range/graduated filters in landscapes.
Planning trips to places like Bryce Canyon and Arches along with Hawaii next year.
Is this an other budget? It is a good idea to spend money on places to go and things to see, having your camera in your backyard only is limiting. Subjects are part of your photography.
I am just wondering if I should go the FX route or just stick with the 3200 and get some really good lenses.
Since you have good DX lenses concentrate on FX lenses, wait for bodies. Also on bodies I dare to go second hand, a D800 (E) is cheapish these days and hard to beat (for macro and landscapes) if you post process and use it correctly. But indeed jumping into a D7200 or D500 upgrade seems logical as many state, personally I would go to complement the D3200 with something that can help what you want to shoot (your experience is important). D500 might be the best for macro upgrade, landscape you might want to go 36Mpix and FX to go wider.
Keep in mind that a good photographer uses material to make his work easier, even with the simpiest machine they do good work (youtube: Pro photograper cheap camera).
P.S.: I understand a pro going for a new high end camera since they do take a high number of pictures (talking over 5000/week), for someone who takes less pictures a second hand semi pro or pro body, from a trusted reseller can allow to get super machines from gear junkies that need the latest machine.