looking for good grid for html

[Hendra Kurniawan]

I'm looking for alternative to jqgrid, free is preferred, but licensed is OK too. As long as it can make my life easier. Anybody know good grid? I need a grid that's easily configured. main features I need:
1. handles dropdowns, datepicker, checkbox and radio button inside grid
2. capable of inline editting
3. plays nice with json

I've been using jqgrid, but there are some complaints:
1. If I want to load data from database to dropdown columns in grid, I need to populate the dropdowns first before populating the grid. This is my main disappointment.
2. When cells are in inline editing mode, their names changes to something funny like 5_grid_x. This is very annoying
3. If any of you ever experience VB6, perhaps you know Sheridan widgets. It has an event onDropDown (or something like that. bottom line, it fires when dropdown in grid is dropped down). The programming is quite simple:

private sub onDropdown(colIndex)

if colIndex=1 then
  getValuesFromTableA
end if

if colIndex=2 then
  getValuesFromTableBWhereCodeMatchesTheValueSelectedInCol1
end if

end sub

and there you have it, col 2 will contain only values whose parent is the value selected in col A. To achieve the same result in jqgrid, you must code the data retrieval in several separate events. Very very inefficient.
4.when trying to insert datepicker to grid, you need some extra work like setting time out.
5.Sometimes, when editing cell value, we need to keep the cell's old value. This old value is not accessible when cell is in edit mode. wow!

Thank you.