New to the two channel world - Advice needed on preamp


I am new to the two channel arena, but have been in AV my entire career. I am looking to find a solid preamp to match with my system.   I would be open to integrated amps if they are a better option.

Current Rig

Paradigm Prestige 85F’s and Prestige 1000SW Sub (Not sure if I really need a sub or not, but I have it nonetheless)
Bryston 4B-ST
Sony ZA3100ES (I know its an AVR, but it had the requisite preouts)

I listen mostly to FLAC files off of a PC. Looking to stay under $2K. Any advice for a newbie?
theaudioninja
Since your speakers are bi-wire, I’d get a Balanced Audio Technology VK-300SE integrated (current model now called VK-3000SE). You could power the mids-highs with the BAT and bass with the Bryston (I used this very configuration with my B&W 804D3s with much success). Good luck!

P.S. The BAT has both balanced and RCA "Preamp out" connections which makes bi-amping a snap.
Pick yourself up something like a nobsound ns-05p to start . compare any preamp to that first . You may save yourself 2k that you can put elsewhere . For $50 every single audiophile should try one . This is for digital though 
Thank you for the tips!

dweller - The BAT you mention is $8K.  Is there a model that is closer to my budget that would serve me well?

maple - looks interesting.  I’m going to order one off of eBay and see how that sounds.
Try jbl nano patch or schiit sys passive preamp. If you need a remote the schiit saga s is quite cheap and has a passive mode as well