Agree with a bunch of the replies so far.
The F4i will be a fantastic bike but you have to be good on throttle control and experience and yes you will be more hunched over (but it will feel good when you're going fast and/or cornering

). I had a 1999 F4 and I think the difference between that and the F4i was fuel injection (and all the goodies FI gets you) and I'm sure a bunch of other stuff too but still you have power, clipons, etc.
The FZ6 is more upright and is not such a racer type bike left of 8K RPM.
I love my FZ6 but these days, I keep missing my old F4 and keep trying to make the FZ6 into one.
As far as so-called "beginner" bikes, I'd pick the FZ6 because you can tame it just as long as you stay below 8K (if you're really a beginner, stay below 5-6K RPM). It's hard to call either a beginner bike. Insurance cost tells me the FZ6 is not as sporty as the F4.
I know this is totally subjective and I don't mean to be insulting at all but I really think the FZ6 crowd is a bit more mature (not necessarily age either) than the CBR crowd (F4s, RRs, etc. included). I used to frequent the CBR forums but it got so tired reading posts by mouthy 20 somethings that still think they're invincible. No offense intended -- I guess when you're young like that you think differently. I know not all are like that but the CBR forums leave me with that impression. Part of why I buy includes good support through forums, etc.
Anyway, I really miss that F4 and at the time longed for an F4i; I bought the F4 5 days before Christmas for about $2700 (including tank bag and Joe Rocket Jacket and put $300 into it) and traded 5 months later and got about $2500 back for a minimal loss). I think they hold value well if you buy right (for a motorcycle at least). You you may be able to get a cheaper F4i if you wait for a bad time to sell.
Good luck,
Dennis