Decisions....Decisions....

Kind of not homesteady - in the true sense of the word - but communication with the outside world is pretty important.  As such, our cell phone plan is up for renewal, so we can get new phones.  A lot has changed in the last two years since we got our current phones...so many decisions now!!  I have narrowed my search down to 3 phones...and was wondering if any of you have owned any of these or knew someone who did/does and what your/their experience was with each.  I appreciate all comments on these phones - yay or nay.  I do not want to end up with a phone that gives me more grief than necessary as I have enough going on in my life now :-)

• iPhone 4 (not S - wayyyyy too expensive)
• Samsung Conquer 4G
• Samsung Epic 4G

Now, we do not have 4G where we live yet...but maybe in the next 2 years (hey - you never know!).  But I would be able to access 4G when I commute to the big city.  I think that would be the only drawback to the iPhone - it is only 3G...ideas?  Thoughts?  Recommendations?  Thanks!