Personally, i think that they may be ok to watch and will do the job, but they will be visually a little tacky, if you know what i mean, they will be noticably aftermarket and i think on these you have the wires which plug in the side of the screen (and personally i do not like to see any wires!!!) there are other sets out there for not too much more money and i think they would be much better (a little less discreet and subtle), i think you need to maintain class on entertainment install...... especially in a LEXUS!!
Thats my personal thoughts on this subject, if you would like some information of some other suppliers for in car enteratinment at very good prices, then i would be happy to PM you the information (i do not want to annoy any moderators :D )
Simon