As the guy above said, changing the rear Talas to propedal would probably be the best single upgrade. According to Fox, they may offer this service in the near future (couple of months) for around $100- check with Fox in a couple of months. Other things that I have done to my Liquid are more of a personal, rather than direct performance issue- I changed to a 2x9 drivetrain (36/22 up front), gripshift, WTB power V saddle, Azonic riser bar and shorty stem (75mm), and lighter tires (the wheels are still stock). It looks real mean this way, like a wannabe freerider, and it makes me ride faster, so I'm going for it...