It really depends on the type of massage you practice and if you need to change your working height.
The vast majority of couches are imported from the far east and "branded" by the importer and therefore there is little to chose between them.
For a little extra it may be worth investing in an Affinity or Marsh couch. Both are very high quality and will last for years. But if you don't need to move your couch, then it maybe worth looking at some of the spa or physio suppliers for either a static or electric couch.