S-Line PD -- Drives 300 to 375 feet -- It is so glidey & laser straight until the very last part of the flight where it fades forward and left, but my favorite thing about it is that it loves low lines. I find myself wanting to use it on 200 foot low ceiling tunnel shots, but I always talk myself out of it.
The SPD excels at those powered down low tunnel shots that you need to fade in. It curves sharply but doesn't fade too much or too little. Best disc I own.