That international unlocked version still has a locked boot loader. Also, this is the 16gig, 2gig ram version - not the 32gig, 3gig ram version. Plus it costs $649 for that version without the SquareTrade warranty.
If I were you I would try to get a 32gig/3gig model from T-Mobile because that is the only one without a locked bootloader. I think the full price from T-Mobile is similar or a bit cheaper even, and that phone will run with about any GSM sim chip just by plugging it in and maybe changing the APN.