In my opinion, the LEDs are your best drop in option. They have a better beam pattern than drop in HID but are still no where near what you will get with a projector retrofit and quality HIDs. Another common question is the high beams. As with most drop in HID kits, the high beams on the drop in LED's are subpar. You don't get a huge difference between low and high beam as you do with a stock halogen bulb, BUT the bright low beams make up for that. As far as drop in LED vs. HID, the LED are nice in the sense that you have no additional wiring or no relay harnesses or ballasts needed to run the bulbs. They truly are a drop in, plug in, and go install.
The setup that we have had the best luck with is the LED headlight bulbs paired with rigids DOT fog lights in the oem location. Both of these options are fully plug and play and allow you to have much more light than stock but not blind everyone on the road and get bothered by LEO's.