Decent preamp


I didn't say good because I'm in the budget but what's a decent preamp I could buy to work with Aragon 2004 amp? I'm thinking tube but let me know your opinions. Was advised to stay away from emotiva and other factory direct brands but not sure if that's a valid opinion.
cygnusx8
B&K Pro 10 pre w outboard power supply.Bilt like a tank with very good mm/Mc phono stage.Has mono option and ca be run as a passive preamp.
Re used gear: +1 on c-j. I have the PV-10AL and the PF-R preamps which I just recapped. You can never go wrong with c-j sound. Their build quality is great, and on older products what you have to do is just replace the electrolytics, provided these units were not abused. Still, you'll have more peace of mind if you get a tech to take a look. 
Jolida fusion tube preamp. Really nice and musical. If I had to describe the sound in a word it would be juicy. 
UnderwoodHiFi is running an incredible special on W4S integrated amps, but hurry
The Jolida Fusion preamp is a good recommendation. I own one. Retailed at $1350. Not often found used. My thinking it is worth $700. That is somewhat over the OP's budget. However if one was to be found at the stated budget it would be a good find.