Consumer Reports reported on garbage disposals in Feb '04:
The Kenmore 6011 1/2 HP for $70 (with 1 year warranty) was their Best Buy, being the best performer of all 1/2 HP models and, one of the cheapest disposals in the test. It came in #8, below 7 much more expensive models between 3/4 and 1 HP.
The Kenmore 60554 3/4 HP, $135, 7 year warranty (wow!), was #3, just barely below the #2 ISE 555ss, 3/4 HP, $160, and the #1 Viking Pro VCFW1020, 1 HP, $420 (yikes!).
How much power? Consumer Reports says:
"Consider your food waste. Even models with the least powerful 1/3-hp motor can handle softer waste such as carrots and corn kernels. But if your kitchen waste typically includes tougher stuff, look for a more powerful 3/4-hp or 1-hp model. Those we tested ground bones fastest and finest, reducing the chance of clogged plumbing traps." (p. 43)