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As the successor to the trusty R3, the Uniden R4 offers better false alert filtering, Gatso detection, and two Low Noise Amplifiers (LNA) to increase the overall range. Basically, the Uniden R4 takes everything good about the R3 and turns it up a notch, but there is a price jump to consider.

As of this writing, the R3 retails for $299 on Amazon, while the Uniden R4 goes for $350. Is it worth spending the extra money to hav...