Amp/Preamps vs. High end AV Receivers


Hi,
I am sure this topic had been discussed exhaustively. I am new to this arena looking for some help to upgrade my Onkyo AV Receiver (135 w/channel). I am debating whether to the AV route or the AMP/Preamp combo. Naturally, I understand that I get what I pay for.

Would appreciate some inputs and suggestions regarding:
1. AMP/PREAMP combo route - 
2. AV route

I am not looking at a huge budget but a decent one. 

Thanks in advance
128x128terrancej
Dear All,
Thank you all for your inputs and feedback. Much appreciated. I will explore the ideas (along with the budget) and see what is the best option. As one of you indicated, 2ch is not my priority as most of the music videos I listen as well are in 5.1.

I am based out of Atlanta and if anyone is up for a phone chat, please ping me.

Thanks
If this is for 2 channel listening, there are no high end av receivers, too much compromise toward av. I have had a few onkyo/Yamaha av receivers and the  onkyo’s Seemed to have a more warmer sound. 
You will do far better getting an integrated amp like the new yamaha’s for the cheap or go up to the hegel’s for better sound quality. You will still get the built in dacs plus a few other features but the sound quality will be much better for 2 channel
The OP just stated that 2 channel is not his priority and he's using his system for mostly surrounds.
If you like Onkyo for rest of the capabilities then just get a high powered low cost 5 channel amp that can do 2 ohm stable like ATI AT525NC. Small form factor , no heat, excellent measurements. You can spring for newer hypex models but they will be more expensive than ATI. 

For a great deal contact @apexstereo .

You can continue to upgrade AV when you see fit and the amp will keep your speakers adequately powered. Frees up your choice of AV in the future.
I can't afford really high-end expensive gear but that being said I have my "analog" system which consists of Emotiva separates which cost about the same as my Denon w/atmos and neural x for home theatre. About the only difference my aging ears can tell is that Emotiva separates seem to have better low end or more precisely go lower.