The Samson GB9001 is excellent for wheatgrass and all leafy greens. The low 80 RPM speed insures the highest nutrional value. In addition to juicing, this unit can also make pasta, noodles, salsa, baby food, etc.
Other key points to consider are:
Simplest assembly and disassembly, (15 seconds total time)
Fastest cleaning (1 minute)
Samson has a built-in control to prevent overheating and restarts when it has cooled down. You don't ever need to worry about overheating