I'm a little passed the amateur stage of photography and I'm looking to upgrade my Nikon D3100 my problem- I like Canon options, prices?

But I already have Nikon lenses Etc. Should I make the switch or stick to Nikon

*past

Past, not passed. Stick with what you have lens wise.

You would expect the Super Bowl champions to have drafted well in the last few drafts

What sort of options call to you? I've found that I ignore most options and shoot as I did with an old film camera, that is, in manual mode. The only option that I have found handy is rear button focus mode which Nikon & Canon support. I rarely use live view (live view is great for product and macro photography since you can do critical manual focusing) and I rarely shoot video with a DSLR (find it too frustrating compared to a prosumer camcorder).

If you have lots of lenses, it is expensive to switch. The Canon options may sound nifty, but you might find yourself ignoring them once you have played with them.

If you really want an upgrade, get the D500. That is an amazing body. I got to play with one last year and it really is a superb camera for a DX sensor. I haven't felt camera envy in a long time.

If your existing camera works, you don't need a new one.

As to changing systems, it doesn't matter. If you can't do it with a Nikon, you won't suddenly be able to do it with a Canon - or a Pentax for that matter.

In order to really give you good answers, you need to be more specific in terms of what types of photography you want to do, and what is it about your current D3100 that is not working for you. There's not a huge difference between Canon and Nikon. You can get just as good results regardless of which brand you choose. However, that's not to say that one brand has a specific feature on a specific body that would make it the best option for you, and within your budget. You need to state your budget because it makes no sense in recommending a D850 if you can't afford it.

Knowing your needs will allow us to better answer your question which could be to stick Nikon, or switch to Canon, or even switch to Sony which a lot of professionals are doing.

Keep what you have.
Is your camera broken?
WHY do you think you need to " upgrade "?
WHAT will a newer camera do that your current one can't?

The best improvement you could possibly make
is continuing to become a better photographer.

So, who exactly told you that you're PAST the "amateur stage"? Let me give you a reality check, you wouldn't be asking that question if you really were past the amateur stage and
making a living from photography.

Next, regarding your desire to upgrade, what does your current camera NOT have that you are in desperate need of? WHAT options does Canon (among all their cameras in your price range) have that you can't do without, that your current camera does not offer you? Sounds more like you want to upgrade for the sake of spending money or you think upgrading will somehow miraculously make you a better photographer… But it never will because that's not how things work in reality, and you'll NEVER be satisfied with what you have, and will never appreciate what you have. Yeah, the grass does look greener on the other side of the fence, huh?

Reminds me of the puppy with a nice bone in its jaws… Looks down into the pond and sees another puppy with a bigger bone, lets go of his bone, that falls in the water and sinks, to try to take the bone away from his reflection… And ends up with nothing.

What sort of "better" pictures do you hope to produce by upgrading? Spend at least at another year using that camera before deciding to make a change.

Only you can decide whether it is worth making the investment of changing a whole system. You "like" Canon stuff - but have you ever tried it, or are you looking simply at specifications? Once you are casting your net outwards you owe it to yourself also to look at Sony and Pentax. Those two, along with Canon and Nikon, make up the foursome of good mainstream brands. All have their good points and their quirks.