I've had a head seize and spoken to several of our customers who have had heads seize up on them by going with aftermarket head gaskets. I use Suzuki genuine only now and recommend them to any of our customers doing engine work or swaps. The reason is that there are a couple gaskets on the market that actually block an oil port to the head that causes reduced flow. This can and has led to seized heads before.
Suzuki genuine may cost a bit more, but its cheaper than replacing a complete head. Fair warning....
any body that is looking for a cheap head gasket go through hawks...save you big money on them,so much that if you bought all the gaskets separate from hawks you would still get it cheaper than all the head gasket sets i have priced .their good people too