I would also investigate the Baldor or KB unit, you can get them in a chassis version to save money if you already have the enclosure and speed pot.
To test the motor first, either run it off a straight bridge across the mains, or an automotive battery will also give you some idea of the performance, test in both directions.
It would also be wise to check the brushes while you have it off.
The KB and Baldor can be had on ebay usually, they come in either 2 quadrant (single direction, no braking) or 4 quadrant, which gives you the dynamic braking and reverse.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.