Incorrect.
Chips are 1w/gh @ 120gh, ~.85w/gh @ 100gh. Tested on live units.
Sure. Even with what you said, compared to S3
S3 BA Hex4M
Cost 450 (0.725btc) 4x360? 205 Euro + cost of 4 Minions
Avail 10-20 July ?? 2 to 4 weeks once Minion chips arrive (when?)
Power 366W 4x120W 4x120W
Speed 478GH 480GH 480GH
Enuff said.
To be fair, with the groupbuy for these boards they'll be 20% off, so ~US$223. You didn't add on $80 in heatsinks if you can get a deal and say 1/4 of a TPLINK router (assuming running four boards off one) for $13, so you're at ~$320 plus the cost of chips and shipping back and forth.
Obviously just getting a refund is the best option, but if you assume that refunds from BA will be slow to come (or never arrive) getting a Hex4M might be worthwhile.
Sending in 2x the chips and getting an assembled boards is a much better deal though. If you have an X3, sending 96 chips in and getting 12 boards for only shipping and $1300 for heatsinks and TPLINK routers is a great deal. Sure you need to add 6kW worth of power supplies, but you'd have to add almost that much worth for the S3s anyway.