Ahh... but where's the fun in using a pre-programmed PIC. And Sylvio wouldn't lean much about PBP etc

Sylvio, I've just used a 16F676 in one project that the guys here helped me out with, and I'm sure they would all do the same if you chose to go down this route. The only limitation of using the 16F676 is the pin count. 6 of the 12 I/O pins available will be required for a normal 16X2 LCD in 4 bit mode, and without details on the 20 x 4 LCD you are intending to use, you may find it needs more, which would thus limit the number of pins left for your A/D inputs.