Hi im looking for some advice, I currently own a canon Rebal t5i. But im looking to upgrade to something of a more professional grade. Some of the cameras I looked at were the 7d mark ii and nikon d810. Im doing wildlife and street photography, so a camera of that nature would be best. Looking for suggestions.
The (by quite a bit before any alternative, actually) best camera for wildlife and spontaneous photography is AFAICS the Nikon D500. IMHO the Canon equivalent, the 7D Mark 2, is quite a bit less impressive, but should still be a good choice. Lower models like the Nikon D7100 or D7200 and the Canon 70D or 80D should also perform nicely.
Why is the D500 better than say a D5 for spontaneous images ? Because the AF covers almost the complete image area.
Why is the D500 better than a D5 for wildlife ? Because it has the crop factor, giving even more range, very important for wildlife shooters.
Also the D500 has slightly more resolution than the D5 (no AA filter) and with the fastest memory cards it has an "endless" buffer. I.e. every 200 images or 20 seconds it will stop due to a software limitation, but you only have to raise and lower the trigger finger on the shutter quickly and it instantly will continue taking pictures until the next 200 images are full, and you can continue this until the card itself is full.
I dont feel like I have even remotely enough understanding of Canon glas to recomment anything from them. In my general impression the good Canon glas tends to be really pricey.