Roasting coffee is fun at first but once the novelty wears off, is
something you do because you get fresher coffee and/or it costs less.
However, the thing that started driving me nuts was the small batch
sizes. Most of the units you linked to look to be like 3-6 oz models
which for me, would not be enough.

<a href="http://www.sweetmarias.com">Sweet Marias</a> sell quite a few
different roasters, but more importantly, they post reviews of each
roasted detailing the features and warts of each roaster. Worth
reading.