L The List
All About You! Wellness BootCampwww.aaybootcamp.com
Motivating, challenging and they really mix it up. The only drawback is the cost.
Lift Personal Trainerswww.trainersilverlake.com
These two have their own private studio and will really dial your workout and diet to its maximum potential. Of all the one-on-one trainers I've tried, these guys are the best. And their prices are awesome. They do couples training, too.
Extreme Boot Campwww.extremebootcamp.com
These guy are great, and really regimented. If you don't mind being in a larger group, this is the way to go.
If you are looking for someone to keep you motivated... look no further.
I've never worked with Sam Page myself, but I have a lot of friends who won't shut up about him, so he gets to be on the list.