Considering upgrading (please help)

[jdrhjr]

This is the HTiB I currently have
http://www.onkyousa.com/model.cfm?cl...ems&m=HT-S5300

and, well, I have never been happy with its performance. I turn the volume up to about 45 (the max is 79) and I get clipping distortion in most of my blu ray movies. I'm thinking it just has a weak amp (even though it's rated as giving 130 watts per channel) and it doesn't support external amplification.

Now, I want to possibly upgrade to this receiver
http://www.us.onkyo.com/model.cfm?m=...s=Receiver&p=i
What I want to know is if I would see a significant upgrade in sound quality from this or do I need to shop around more? I want to play my movies pretty loudly.

Thanks in advance.

EDIT: a bit more info:

I have the receiver set to 100hz, all channels set to 0db (except for the sub, I have that at +2) and I'm not running any post-processing (Cinema Filter, Dynamic Volume, etc)