Best preamp (used or new) under $350???

I'm thinking of upgrading my preamp but have a budget of about $350. I currently am running a Schiit SYS. I'm happy with it but it only has 2 inputs and I would also like a remote for volume. I'm considering the Schiit Saga but would like to inquire with the forum if there are others that I should consider?  I could buy new or used so please let me know your thoughts. 

The other pieces in my system are a Red Dragon S500 power amp, Sonos Connect, Onix XCD88 CD player. I'll also be connecting my tv via a SMSL Sanskrit DAC. Speakers are Kef ls50.