There are some issues with the 254, but I have one and they don't really bother me. If you pick one up from HK on their ebay store, they're shipping with the newest firmware and from what others have said is awesome.
I looked at the 663 before I got my 254, and the two HDMI ports kind of broke that.
The GUI on the 254 is sweet, really easy to set stuff up. Great sound, good power. It won't knock the walls down, but it's enough for what I need. I would recommend it.
But there are lots of others that like the 663.
If you have any other questions about the 254 I would love to help.
I looked at the 663 before I got my 254, and the two HDMI ports kind of broke that.
The GUI on the 254 is sweet, really easy to set stuff up. Great sound, good power. It won't knock the walls down, but it's enough for what I need. I would recommend it.
But there are lots of others that like the 663.
If you have any other questions about the 254 I would love to help.