Laser Wood

Laser Wood is a simple one, they have about 20 options in their store and seem to be priced well. The variety does not come from the types of wood either. 

Simply put you have the option between Butterwood Sheets or MDF Sheets, the 20 options come from the different thicknesses. It could not be more simple. 

Personally I don't think their MDF sheet colour is appealing since it is quite dark so more appropriate for cutting than engraving.