i see something starting here, faser you are falling into a trap, and no i don't mean from other growers i am referring to your self, concerned about the lighting.
i would say get growing down pat first, and second i still have to say that bigger plants are not going to give you bigger yields.
you should do just fine with c.f.l. get the book buds for less'
look at it like this, you spend 300-500 on h.i.d. lighting and then what,
i have seen allot of people spend that money only to call and say shits not working right for them, unless you grow for profit, reason with your self and ask why you need bigger lights, if it's out of love and you just personally want a bigger set up then at the end of your current cycle redo you grow, and make all the changes that are needed for it, space,venting,a/c if needed, if not stick to one thing and in time you will progress to another level.
some people if not all, get growers fever, they want this and that and the latest and greatest but at the end of the day it's all bullshit. big lights means bigger headaches at times, i would say in IMHO your fine, just learn the basics and move up from there.
every grower has there own style of doing things/lights and all.
find yours im sure your going to bang out some super smoke, all the best.