blulab combo has done fine by me and got it dirt cheap off an auction house site for next to nothing.
ive always had problems with ph meters... i go with the 5 dollar gh test kit. orange to yellow and your good to go.
ive had problems breaking the glass part of the probe on the bluelabs. I had a little better luck with my Milwaukee
You could spend $25 more and get a cheap Milwaukee pH pen that would do you much better. I feel like your accuracy with any kind of color matching pH kit is probably about +/- .5-1 pH. Not as accurate as I would like.ive always had problems with ph meters... i go with the 5 dollar gh test kit. orange to yellow and your good to go.