The Oppo BDP-83 is widely held to be one of the best performing Blu-ray players on the market, and we've been impressed enough with its image quality that we use it as the reference player in all our Blu-ray player reviews. Still, it costs $500, which is out of reach for most buyers.
The Oppo BDP-80 initially appears to be an attractive "sweet spot" product, costing $290 with almost all the same functionality as the BDP-83. Looking closer, however, we just couldn't find enough value to justify the $290 price tag, as it lacks any streaming media features and built-in Wi-Fi, plus its performance wasn't anything out of the ordinary. To be fair, Oppo doesn't intend for the BDP-80 to be used as a standalone player; instead, the company offers it as a cheaper option if you intend to use an outboard video scaler.
While scaler-users seeking an Oppo will probably be satisfied with the BDP-80, people without scalers who just want an Oppo but can't afford the BDP-83, have plenty of better options.