Bad cracking = Check-strap. Can be picked up for £30-40. Again not a hard DIY job to replace, probably a bit more fiddly than the top-hat bushes but not hard. Door card and speaker need to be removed for access inside the door panel, but otherwise it's just a few screws and bolts.
Droplinks - maybe half an hour per side, again not a hard job at all... Some good uprated parts available online (Meyle perhaps?), if not then originals aren't bad at all.