Sorry, off topic too.
X6500: $580 / 250MH/s = $2.32/MH (with early payment discount, it's $2.24/MH)
ZTEX: $460 / 190 MH/s = $2.42/MH
You forgot to mention that there are volume discounts, see
https://bitcointalk.org/index.php?topic=49180.0, e.g.:
5 x UFM-1.15x: $2100 / 950 MH/s =
$2.21/MH10 x UFM-1.15x: $3900 / 1900 MH/s =
$2.05/MH25 x UFM-1.15x: $9000 / 4750 MH/s =
$1.89/MH...
Summary: our bulk prices are yet to be published. But, even our single quantity is better than your 100 if you optimistically assume we will get close to the performance you are getting eventually: $1.53/MH at 380 MH/s.