I saw this mentioned elsewhere. The NJO toys would be great, along with a lot of other EU toys.
Think of all the bad jedi you can get! Right now you have a mess of good jedi toys, but only Dooku, vader, maul and Sidious.
4 bad guys! you need more. EU gives you that. =) Instant playability all kids would like that
NJO is good too, as the bad guys are tough and evil looking. Sure most fo the stories in the series stunk, and chewie died in the dumbest way, but lots of jedi and baddies.