Is dedicated PreAmp with Oppo 105 needed?


I think I've a decent HT setup but still feel there's something missing. I watch movies 70% & listen to music 30%.

Since Oppo provides pretty clean sound, wondering if upgrading to a dedicated PreAmp will make any difference. If it does, what would you recommend in say $1000-$2000 range? I intend to bypass the Video & connect straight to my Plasma on HDMI 1.4a.

Thank you!
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LRC Speakers: Tyler Acoustics Linbrook System II
Surround Speakers: JBL S312
Amplifier: Parasound Halo A51
BD:Oppo 105
Tape Deck: Nakamichi RX-505
Room: 16x18+ with some open area, so sound can bleed
hitsofmisses
@atmasphere: I looked at both the sites & the price of their products. Don’t you think I’ll get more value for my money by getting a used VAC or CJ or ARC products then paying the same amount for a brand new product from them?

@tomcarr:  I don’t think Schiit products are in the same league. 
I looked at both the sites & the price of their products. Don’t you think I’ll get more value for my money by getting a used VAC or CJ or ARC products then paying the same amount for a brand new product from them?
@hitsofmisses You often get more for the money buying used! So yes :)
@junzhang10 : Don’t know much about “Sony ES TA-P9000ES 5 channel preamp” & how does it fare against modified “Krell S1200” or other Tube PreAmp. 
Don’t know much about “Sony ES TA-P9000ES 5 channel preamp
It was effective but prone to hum problems.  Not a  modern low-noise preamp.

 & how does it fare against modified “Krell S1200” or other Tube PreAmp.
Neither are those.  AFAIK, no one is making a multichannel preamp with performance equal to what one can get in a stereo preamp today.
@kr4 : So then the only option is to get a Stereo PreAmp with HT Passthrough.

Hopefully, the fronts speakers won’t be terribly loud or will have a different sound signature.