Marantz 4003 vs 5003, with PS3 LPCM, DTSMA, DDTHD twist

[chops13]

Setup:

My BD player is a PS3. I am buying an HDMI 1.3a compliant reciever. 1.3a spec to get deep color support for video.

Question/clarification.

1. The only way to get lossless (LPCM, DTS-MA, DD TrueHD) from the PS3 to the receiver is LPCM over HDMI.

Assuming this is correct:

2. Why would I buy a receiver that was nothing more than HDMI 1.3a compliant to ensure I get the deep color for video? I believe the answer is I wouldn't.

3. I am buying either a Marantz 4003 or 5003.

Link: http://ca.marantz.com/Products/172.asp

I don't care about the amplification power because I have 200W monoblocks. I just need the preamp.

It appears the differences are the (DSP: Cirrus vs. TI Aureus) (Auto Calibration: Marantz vs. Audyssey) (5003 is software upgradeable) (5003 has DSD decoding)

The only thing there I think matter is the DSP for Video upscale and maybe the RS232 software upgradeable.

Conclusion:

I am thinking I will never benefit from paying the extra $300 for the 5003. Make sense?