i fitted 6inch speakers in the door without pods... looked pretty good
had to cut out a bit of the door but nothing major... theres already a whole there jus had to make it a tiny bit bigger

^thats the same as mine... except the previous owner did them, and made the holes too high so the window winder fowels on the speakers.
just make sure you put them low enoutgh, as speeker mesh is like skin sandpaper [:p]

If your window winders foul the speakers go and find yourself a set of short widers from a RWD Gemini. They had 2 lengths in them but the short ones work perfectly. All you need to do is drill a hole in the centre for the retaining screw as the Gemini uses a clip.

I had to do this to clear the intrusion bars on my roll cage

or if your really keen get the power windows kit off ebay!

what i did was take the original door cards off completely (take them off nicely incase you want to put them back on) and basically templated and made a whole new door card out of MDF.

then you can cut the holes where you like, and space the speakers with MDF cutouts for whichever side you like. or use whatever pod you like then.

i then ran black canvas across everything and stapled from the back so it all looks neat.

by doing this i have fit 6.5" splits in the front - and 6" speakers in the back doors (4dr Mk2).

my tip; use a fairly thick MDF (at least double the original door card depth)so it doesnt rattle. and dont destroy any of the original gear - that way if you muck something up you can just put the original stuff back on :)