alpine amp to pioneer deck, alpine speakers

i want to hook up a 4 channel alpine amp 50x4  to a pioneer deck and alpine speakers, my question is what are the best type speakers to use? do i use 2 way or full range speakers?   i may hook up a sub at a later date.i just want to fill the truck with sound now!

one other question, what are the size of speakers in the front door and rear door

this will be in a 2002 ram quad cab pick up

1 more install question what is the best way to hook this up, the pioneer deck has 50x4 and the alpine amp has 50x4

any good combination ideas out there??

any help would be appreciated

thanks