Greetings,

If you have a Mac laptop, do consider the Metric Halo ULN2.
These can be had used for $725 or so, and represents an incredible
combination of fidelity,
quality and features. Though a bit more money, well, well worth the
splurge.

http://www.mhlabs.com/metric_halo/products/mio/uln2/

regards,
Michael