Air Tight DT-01 Disc Flattener $2,250
http://www.musicdirect.com/product/49751
"Unlike other flatteners, only the outer edge and center of the record are heated, thus doing the job that needs to be done and without the chance of causing distortion in the middle and center of record. Further, the grooves are not heated and therefore their sonic shape is preserved. The entire process takes four hours; two to heat up and two to cool down."
Furutech DFV-1 LP Flattener $1,480
http://www.needledoctor.com/Furutech-DFV-1-LP-Flattener?sc=2&category=14360
Space-saving, vertical design, LP flattener.