Xdm, Kdm, Gdm.. or just, none?

[William Leese <wleese@europe.nl.com>]

After recently getting used to the Blackbox WM i decided i'd try to replace 
all my KDE apps because they seem more CPU intensive (due to extra KDE 
proceses?) than other apps. 

Problem is that i've installed Kdm, not because i needed it.. but just 
because i thought it was quite convinient when using more than one WM. 

However, it is.. after all a KDE app.. which invokes other KDE services (do 
correct me if i'm wrong, this is just what i've observed from top) and 
because it will stay active till i log off X.. i'm kinda stuck with it..

So, what i want to have is just plain X with an rxvt terminal.. but if i 
uninstall or pervent Kdm from starting, i'll be dumped into KDE when i startx 
by default. So the question (yes yes, finally) is how do i avoid this 
behavior, which script, config file needs to be changed and is there anything 
else i need to know?

thanks in advance,

William