Integrated Amplifier Recommendations Needed

I have a pair of JBL L112 speakers in excellent condition, but I would like an integrated amplifier to drive them. The JBLs are fairly efficient, 89 dB @ 1 W/1 M, and the maximum recommended amplifier power is 300 watts. My room is 20X25 with 10-foot ceilings.  

100 wpc would be adequate; what do you all recommend?  I want to stay under $2000, and used equipment is fine.

I listen to 80% jazz, from small groups to big bands.  The rest mixes classical, classic rock, Steely Dan, etc.  

Best,

MB