....my vote for the English-Japanese dictionary goes to Obunsha. If you want to go deeper, Reader's Plus by Kenkyusha is very good. But this is a "supplement" dictionary that does not include elementary words.
It is one of those injustices of life that the more you study a language, the more money you have to spend on a dictionary for it to be of any use. Most of the cheaper electronic dictionaries are useless for me. I know little about electronic dictionaries because I have better uses for my money than to buy a 50000 yen dictionary that may not be of any use.