If people want to say, "change this and I'll fav", then their opinion doesn't matter anyway, if that's what you're worrying about.
If you truly think that your choice of font is the best choice, then use it.
Try doing something, usually if I just throw in some renders, some screenshots, and text, I can adjust the three and it all comes together.
I personally add text first.
Back layouts really seem like a big issue.
If I were to work on this back myself, this wouldn't be ideal, but this is just for reference.
http://a.imageshack.us/img535/2162/full1.png
Try giving every font in all caps on the back the same exact gradient that the logo has on the front.
Everything is awesome except the screenshots. I'd like to see so continguity in them and also made a border of some sort.