I think that some people take the 70/70 thing WAY to seriously.. I mean, as long as you dont go above 70 % humidity for a LONG period of time, your smokes are fine.. And besides that, the humidity that the cigar should be stored at should be determined by YOUR taste, not mine or anyone else here.
I used to freak out about the humidity and temp of my humidor. Now, i just let it be.. Cigar smoking is a hobby, something we do for fun.. When we start killing ourselves over 1 or 2 degrees in temperature, or a few % points of humidity, it stops being fun and becomes more like work..
If you are unsure of the humidity staying level, get the beads. If you want something to maintain temperature, convert a winefrideg or buy an aristocrat.. Beyond that, chill out, relax, and smoke a cigar....
thats just my :2 anyway..