Out of the two, the Yamaha RX-V663 is a better receiver than the Onkyo TX-SR608. Although, the Onkyo is a good AV receiver, it is not as powerful as the Yamaha receiver.
Popular opinion suggests that the best receiver between the Onkyo TX-SR608 and the Yamaha RXV663 is the Onkyo. It boasts ample connectivity, is well built and is 3D compatible. Reviews for the Yamaha RXV663 aren't all that with many saying that the design quality is quite poor.
Onkyo makes many models of receivers. Go to the Onkyo USA site to learn which of their receivers will suit you best, and then click the button labled "Online Dealers" to find the dealer where you can order your receiver. Compare prices from several dealers if cost is important to you.
The Onkyo receivers are excellent because they are high quality. They specialize in bass effect and are consistently rated the highest receiver by best buy.
Onkyo makes higher end receivers, capable of multi-room discrete sound environments. There are a great number of models with significantly different capabilities. Cost of the receiver will depend greatly on the number of features that are included with the receiver. The top end Onkyo receivers cost around $2000, entry level models, about $250. Pros and cons depend on your demand for the features.
The products that Onkyo USA sell are electronics. They sell receivers, home theater systems, headphones, DVD players, amplifiers, speakers, and accessories.
I'd go with the Onkyo but not for the speakers. I'd look for a nice set of Klipsch speakers instead. They will play much louder and clearer for the money than the set from Onkyo. A common rule of thumb in Hi-Fi is to spend twice as much on your speakers than you do on any other part of your system. After all, your speakers have the greatest impact on the sound of your system.
The population of Onkyo is 4,359.
The population of Onkyo is 2,008.
Onkyo was created on 1946-09-17.
The Onkyo has good reviews, and Onkyo in general is a well-recieved brand.
If you still have the original remote, you can use it to program a Logitech Harmony Remote with the 'learning' function. Logitech maintains the largest IR code library in the business, but does not have the codes for a TX-910 or its larger brother, the TX-930. It is possible that codes on file for other Onkyo receivers of that era may work with these remotes as well.
Onkyo is a Japanese manufacturer that is most well-known for producing consumer audio equipment. Accordingly, in English, "onkyo" means "sound harmony."