definitely not worth it. the Android appstore has a lot more apps than Apple iOS, the HTC One X+ has a better design, and better battery life. If it was me, I would've given a thought if it was 32GB or something, but DEFINITELY not 16gb.
EDIT:I just read your post about your X+ being laggy. it shouldn't be, and ROOTing will fix it and make it so much more sexier.