If I am currently Light II, if I chose to switch to Dark later on, will it be harder the more Light I have? If not, is there anything bad about switching sides? ie, are there enough quest options and such to get to Dark V if I switch? I also do not have Diplomacy, so I can't use that to do it. Sorry if these are dumb questions.. I'm just not quite clear on how it all works.
Also, does anyone know yet if Purple lightsabers have an alignment requirement?