I had the extremely expensive tuners. for 30 bucks i bought a standard metronome that played between 40bpm and 250 bpm (I wish it went a bit higher) and it produced an A 440hz tone so i can use it as a tuning reference. all i need.
yea its a nice thing to have, ive never tried them... there is a really good online free metronome that I use. And my tuner is like a cheaper 20$ tuner, the korg, but it works amazingly, very accurate, all I need.

But it looks like it would suit your needs very well.
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