At last some sense in this thread !!!
There is a lot of mis-information in this thread, particularly about brake fluid. Brake fluid is hygroscopic meaning that unless its sealed in a container(even then it will degrade) then it will absorb moisture from the atmosphere. It has nothing to do with how often you use your brakes. Also i'd love to see somebody replace it all and get air out just via the master cylinder
At the end of the day all main dealer servicing is a rip off. The interim service parts and consumables probably cost no more than £40 at dealer cost prices and then they supposedly do a load of checks. If you think those checks are worth another £100 - £200 then please let me know what profession you're in so that I can change career path !!!
If you're not interested or can't do servicing yourself (most likely because you want to maintain the warranty) then the best option is to find a good local independent garage, and as Ganzoom says try to build up a relationship with them. Unfortunately they are unlikely to know any of the common failures on a car as rare as a Lexus until they are many years older, a Lexus garage will have the back up of the whole network and Toyota corporate to guide them on things to look out for. However again is that really worth the extra £100 to £200 on top of what they 'have' to do?
Back to the OP's point I think the main driver for you will most likely be trying to maintain the warranty so you will need to get a stamp in the book at the right mileage or age.