Could you call, say,
www.thenailcompany.co.uk/acatalog/Manicure_Pedicure.html
And tell them you are new and ask for help/advice? They sell many different brands and can probably provide a reason why one tool I'd "better" than another.
Of course some of this may be subjective and depend on how the tool sits in your own hand.
Could you go to a shop? That way you can probably hold them.
National treasures. Who would you choose?
