Reply to dB Monitor

I am currently playing around with a Numark Total Control and have been having a hard time keeping an eye on the dB meters inside traktor. Anyone have any suggestions for a compact dB meter I plan on picking up an external mixer when I save more money for some Pioneer CDJs but until then I would really love to be able to have something I can get a better visual cue from if my levels are way too high. Also I currently have traktor set as up for a master limiter as to not blow my speaker setup I have seen external rack mounted ones. What are your experience with these are they needed if so whats a good model? Thanks again for all the great advice everyone.