A challenge for you experts--a good $350 receiver?

[camper]

Well this will be a tough challenge I think...I had been looking at getting the Onkyo 717 receiver (I'm confident I could get it for $499) since it has many of the features I like, but in an effort to save a bit of cash I'm wondering what other options may be available to me.

- Must have 3D
- Must have network capability (wireless not important)
- No less than 5.1, preferably 7.1
- Good quality system
- Greatly prefer a GUI configuration overlay
- Would love 4k upscaling (is that possible at this price?)
- Must have Audyssey or something like it to configure speakers.

It's a living room setup.

Right now I'm leaning towards a Marantz NR 1403, and the slimness of it I find to be extremely appealing. It comes in at $399, which is slightly higher than my limit but not too bad I won't consider it--especially if it prevents me having to buy a new audio pier.

I'm looking at buying Polk speakers (15C, 45B, 35B, PSW10 sub) and am trying to keep the entire setup sub 1k.

So, any ideas for you gurus?