May I also suggest for your consideration the OBi100? It has received extremely favourable (five star average) reviews on Amazon.com and is similarly priced.
Edit: PX Eliezer reminded me that the OBi100 does not support T.38, in case that is a consideration.
reply to MAS I agree with Mango, but IF you do not need T.38 for fax and IF you do not need a customizable dial plan, then you could very cheaply pick up the predecessor model which is the single-line Grandstream Handytone 286.
Available for about $ 29 on Amazon including shipping.
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