LED Cue Light Is very GOOD in blue because you automatically see all the white lint and dust on the album surface so using a carbon fiber brush you can make sure to get it all off.. Think of a Black light in a college dorm room and seeing all the fuzz on somebodys black shirt it works very well honestly..
And yes for 50 bucks more on an ebay or even new in many cases at a guitar center etc... The M5G is the superior table in my opinion, the finish is much nicer in the paint on the black, and the wire is far better sounding and equal already to the Cardas or better honestly, I have tried both in the past. Again the price differential is so small, the gloss finish on the M5G is a little better for cleaning the table, and the cue light, along with wiring is the better buy in my opinion, and yes it has pitch control but has a switch that just shuts it off and auto sets it to zero anyway...
This is my 2 cents if your buying from scratch on a technics table unless you find one for about 200 bucks used with none of the extras go for it, but for the prices I am seeing between 400 and 575 for any of them including the Grandmaster M5G get the top one if you can. Also they are coming out with a new M6 version or something, but it will be 100% DJ toys with probably only the gold color tone arm or something from what I hear.
Best upgrade champion still on the technics is however the KAB fluid damper.