get the annotated hobbit by douglas a. anderson.
if you've wandered in to this sub, you're an above average fan. that level of devotion warrants more. it'll have all that you mentioned wanting and more background, more info. just more.
​
He is quoted calling the illustrations in the translations "horrors" in a letter to either his American or British publisher in Oct 1963. Oddly enough, it was his way to praise the proper illustrations done by someone that was not hired.
Some of the over the top examples, like the German edition making him so large his legs are longer than Bilbo is tall, and the Japanese version makes him a reptile thats 3 times the size of Bilbo, are covered in The Annotated Hobbit - Revised and Expanded. http://www.amazon.com/The-Annotated-Hobbit-J-R-R-Tolkien/dp/0618134700/ref=sr_1_1?ie=UTF8&qid=1349143506&sr=8-1&keywords=0618134700
My hardcover edition of The Annotated Hobbit (http://www.amazon.com/The-Annotated-Hobbit-J-R-R-Tolkien/dp/0618134700/ref=sr_1_1?ie=UTF8&qid=1355961003&sr=8-1&keywords=Annotated+Hobbit).
aside from the benefit of having all the images, do you think the 70th anniversary edition would be better than the annotated edition?
annotated edition - http://www.amazon.com/The-Annotated-Hobbit-J-R-R-Tolkien/dp/0618134700