The answer is to go to your local purple shirted purveyor of anbaric imaging essentials and molest a few bodies until you find one you like.
I thought I might like the D5300 until I picked it up (My hand size is a bit bigger than is comfortable for that model).
Better than trying to chose vicariously, as all our options and compromises are different.
Well, I had a good fiddle with the bodies in the local purple shirt store.
Nikon D5300. Felt far too small and awkward in my hand! Needless to say I didn't bother picking up any of the new fangled mirrorless interchangable lens system cameras as they were even more wee!
Of the Canon 1300D and the 750D, the 750D felt better for some reason!
And the fact that the 750D can take an external microphone (I must finish off building my stereo pair of omnidirectional mikes.), means that this might be a better camera (or a used one of a similar level) rather than the entry level 1300D.
I think I'd be better off having a look at the used market, as I recon I could get a better body for my money buying used, rather than brand new. Which would give me more money to put into glass, such as the Sigma 105 macro.... I'll probably take a visit to Calumet Photographic in Edinburgh soon, as probably better advise there, than Purple Shirt Land! Plus calumet does do some used gear..