I've got a Pentax K30 and I'm looking to upgrade my equipment, the reason being is that I'm finding it hard to find accessorie's for the Pentax and I have been looking further afield.
I've been looking at the Canon EOS 750D, and the Nikon D5300. I'm a bit confused about which is the better one, I do landscapes and documenting and I don't know which one to choose. can you help me decide please?

Both come with 18-55m lenses.
Many thanks.