Will my PC be able to run MGE at it's fullest?

Intel Core i5-4590 3.3GHz Quad-Core Processor

G.Skill Ripjaws X Series 8 GB (2x4GB) DDR3 1866 RAM

EVGA GeForce GTX 970 4GB ACX GPU

EVGA SuperNOVA 750 80+ Bronze Certified 750W ATX12V/EPS12V PSU

MSI H97 PC MATE ATX LGA1150 Motherboard

Sandisk Ultra Plus 128GB 2.5" SSD

Western Digital Caviar Blue 1TB 3.5" 7200 RPM Internal HD

LG GH24NSB0 DVD/CD Writer

Microsoft Windows 8.1 (64-bit)

ENERMAX Ostrog GT ECA3280A-BR Black/Red Steel/Plastic ATX Mid Tower Case

BenQ GL2460HM Black 24" 2ms HDMI Widescreen LED Backlight LCD Monitor

4GB of Vram should be plenty. Depends what you mean by "fullest" though. There's no standard "maximum" to MGE settings, I mean, you can theoretically set distant land to render a humongous amount of cells, and set distant static detail to be extremely high, as well as have 100% grass density, and run every shader you can find that works with each other, but that would eat up a ridiculous amount of VRAM and wouldn't really make your game look any better than a nicely optimized setup.

tl;dr, yes, it depends on what you want of course, but most likely.

I remember last time I ran it it asked me if i wanted like low medium or high settings or something, and then let me choose stuff to make it better or worse depending on preference.

I'm just wondering with this build if I'll be able to utilize it to make everything look as nice as i can.

Well, try going through the initial config and selecting "high settings", and see how it plays. If you can spare some frames, you can tweak things to make it look nicer, and if the framerate is too low for your taste, you can go through and tweak the settings to optimize it better.

Regardless, with four gigabytes of VRAM, you should be fine. My card only has 1.8GB and I'm able to run quite a few shaders and other fancy things.

Yes. Put "Very High PC" and select all the higher textures you want.

I have a superclocked GTX 760 @ 4GB VRAM and yours is better than mine. I run the above settings and maintain over 30 FPS unless past the little bridge in Seyda Neen (the most graphically overhauled MGSO area in the game) where I get about 23 fps.

sidenote: I find it a little funny and misleading that seyda neen, the place the player starts, is the most graphically overhauled part of the game. You leave Seyda Neen and suddenly things aren't so magnificent anymore, lol.

but I guess MGSO 4 might fix that. Big maybe, but unlikely considering how few modders actually use MGSO (see my thread asking about mod amount).

Nice. Well thanks for the input guys. I appreciate it.