I agree- blue seats would be horrid!
Not a secret that I love Meguiars stuff, but any good leather conditioner will work. I've used both Lexol & Meguiar's Gold Class leather cleaner and conditioner as not very expensive maintenance items. You can get some more expensive stuff, but for every week/2 weeks, they're fine.
Make sure you keep that steering wheel cleaned and conditioned!
As far as removing them, that's tough- check
THIS thread, and maybe
THIS one too over at the Meg's forum.