Ya, Blackburn generally makes quality stuff. I've had a Blackburn hand pump for 15 years and it's every bit as good as new.
I think these days the electronics are pretty simple, so it's more a matter of materials, construction and features. Cateye, Sigma, Specialized, Vetta, Filzer, Garmin and Polar all seem well reviewed and of good quality. I had an old Vetta C-10 for almost 12 years before it crapped out, more because the wires finally came loose. The Filzer dBL4W on my mountain bike has been totally trouble free for years.
I'm pretty much sold on the Cateye Sigma wireless, but having an altimeter and cadence for nearly the same price is quite attractive. Maybe I'll just end up getting a Blackburn and submiting my own review!