Hello Hop Heads....I have been brewing for a few years now, and and have always used those floating thermometers commonly bought at home brew shops...plastic red ends..small beads in bottom.....anyway, recently I picked up a digital one, brand name is tru- temp (10 bucks)....anyway the digital one is down about 10 degrees...meaning cooler in a side by side comparison...I brew allgrain in a bag...and have never had a bad brew....so in the garbage goes the digital....so my question.....whats the most cost effective, accurate thermometer, on the market, in your opinion...thankx....Tom