Rat Shack SPL meter: Analog or Digital?


I decided to buy a Rat Shack SPL meter (to test the frecuency response of my speakers and subwoofer) but I'm not sure which one, the analog or the digital? Robert Harley suggests in his book to buy the analog one but he does not explain why. Is there any reason to choose the analog one over the digital one? or it does not matter?
Thank you for any input.
jorge_err
When I was demoing audio gear, I considered buying one of these to allow me to do a more fair comparison -- apparently it is very hard to set gear to identical volumes, and the louder gear sounds better.

I was told elsewhere, though, that the accuracy of the meters is not good enough to help in this project (I think it's +/-2db?). Is that the opinion here also?

Thanks,

Eric
Eric, the meter is very reproducible, and you would likely be setting levels with a calibrated pink noise, rather than individual test tones. For you what you propose I think the meter would be very well suited, except in the case of comparing an electrostatic with a dynamic speaker. The dispersion patterns of these two are very different and I would question whether or not it's really the same volume. At the moment, I can't really conceive of an alternate method.
The digital version actually has a bar-graph analog display that is just as good as a moving pointer. And the numeric readout sure makes it easier to log results as you vary the speaker setup etc. The digital/analog issue is just about readout convenience...actual performance characteristic of the devices (including any deficiencies) is identical.
Very Interesting: I purchased both the analog and the digital RS sound meters. The analog goes +/- 15 db over
the range 83 Hz to around 8300Hz while the digital stays
around +/- 2 db range; below 83hz it drops like a rock on
both analog and digital and sames goes above 8300Hz both
at exactly where the A or C weighting starts to come in.
I am using both the Rives and the Stereophile test CDs.
I do not quite understand considering I can hear petal
notes down to 25 hz without any apparent loss of sound, maybe 3 or 6 db but 25 DB? At 25Hz, it says I am down 25DB.
At 20khz, I am down 30db. 30DB!!Something is wrong but what??? Yes I followed the instructions,yes I put it on tripod, yes it was steady, yes it was at listening distance and height.
A quick heads up-Radio Shack now has a sale on the analog meter-$29.99 (a big $5 off).