I'm a bit of an Ilford fan so would recommend Ilfotec as a liquid developer and ID-11 as a powder. ID-11 is v. similar to D76 and will develop pretty much anything. With these developers i would stick to FP4 and HP5. HP5 is great as it can be rated from 200 up to 3200 so covers pretty much any eventuality. Also, sticking to one make to start with will sidestep the problems Andy mentioned above. A
s for rinsing, i've just bought some Patterson wetting agent and a couple of bottles of Ionised water for car batteries. So far, no water marks and the film seems to dry quicker as well.