I have the devil's own luck ... my office setup would actually have come in below the OP's budget. and the Sony ES Preamp does quite well as headphone amp... very good.
I found one 1/2 off day sale... this AMAZING.. it is in VG shape Sony ES stack (TA-N77ES, TA-E77ESD, 700ES (TD), 730ES Tuner, and SDP-777ES surround processor and a N110 amp (not an ES series model but has the wood sides too) for $75 for the whole lot... works great... meter lamps burnt out when I bought it..but I replaced them for $20~
the TT is a Hitachi PS-48 (circa 1977) DD turntable that cost $20
and the speakers I'm using with this are some JBL L1's on stands that cost $40 at an Estate sale...
honestly the rack and the speaker stands cost more than the gear (rack $99 on sale and stands $70 about). equipment $135 and stands rack $169~.... however It is not probably easy for anyone to duplicate this set up at any thing near this price... these amps sell $900-1200~ on ebay (just the amp) generally when listed.. so... I have good luck in this regard which makes me quite happy indeed.