[Difermo]

I'm new in ebook and for one week I read all reviews, forums and who knows what to find best answer.
I start studing how to create ePUB and downloading all books i can find on my home language. Then I start to investigate how can i create dictionary for eReader that suport ePUB. I found I cant do that. Sou i discovered that I can do that on kindle devices. I was happy. but then I discovered that it cant have embaded fonts, drop cap... And kindle doesnt suport ePUB. But alsou creating mobi is dificult (compare to ePUB). I read sou many discusions on which one is better. Just dont know which one to buy Kindke PW2 or Sony PRS (for epub) cose my head is full. Maybe some of what i say is wrong sou i ask for help!!!

Things gou like this.
1)I WANT MY OWN DICTIONARY OF MORE THEN 45 000 words. And when stop to some word or taping that word, i want to see meaning. Can i do that
on SONY PRS T2 or T3 (without rooting or who knows what)?
2)Can i create good mobi with math formulas, graphic, embaded fonts and all kind of stafs that epub suport.
3)If Kindle PW2 in couple of mounts start suporting epub can I update software device sou it can read epub files, or I will have to buy new kindle PW3?

speaking.... I dont want to buy "airplain" couple of mounts before "space shatle" comes out (if it comes out). If you understand me.
Taking all my requests what is best eReader for me!!??

THANKS AND SORRY FOR BAD ENGLISH!!