Technology is a wonderous thing. You shouldn't have any worries about cost or switching over. I do agree with reikimaster, before going with the newer stuff, learn up on it first before deciding to make the change over. Also, Mike has a very good point, always keep several extra batteries an chargers. After 10 yrs with my craftsmen cordless drill, I've finally had to replace both batteries within the past 2 yrs. I figure I got my $$$ worth outta 'em.
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"Whether active duty, retired, national guard or reserve - is someone who, at one point in their life, wrote a blank check made payable to "The United States of America", for an amount of "up to and including my life". That is HONOR, and there are way too many people in this country who no longer understand it." -Author Unknown