I've been using a Seiko tuner for more than 15 years, very reliable and acurate.
If I needed to buy a replacement I'd check out the SAT-800
which is the same price I paid all those years ago..
and may well suit your requirements.


The latest range should be available in USA at good prices;
definitely from ebay sellers.

http://electronics.seiko.co.uk/index.php/metronomesandtuners/tuners.html