Woah, hold up. Has it been determined that you have a blown head gasket? Has all other damage been ruled out? Did you get a compression check done?
If the head has not been removed yet, I would also advise that a cylinder leakdown test be done on the motor to verify that nothing else is damaged.
If your head gasket is indeed blown and/or you lifted the head, you have more worries than just a new gasket and new head bolts/studs. You will need to have a mechanic determine whether the head and/or the top of the block warped. If either is warped, they will need to be machined true. If one or both is machined, then I would start worrying about a thicker head gasket. The thickness of the gasket will be determined by how much material is machined off the head/block during resurfacing.
If the head and the block do not need to be surfaced, I would recommend sticking with an OEM head gasket. It's the most reliable available, and in my opinion going with a thicker gasket to try to lower compression is more headache than it's worth. Good management and tuning will prevent a repeat event.
Regarding head gaskets and lowering compression, this is just my personal opinion, so if others disagree with good reason, please post up.
If you haven't yet ordered Hondata, and you are near a Neptune dealer, I highly suggest going Neptune. It is a better product than Hondata, and it is less expensive.
www.hrtuning.com
Rings and ringlands are two different things. Ringlands are part of the piston itself, and if you want stronger ringlands, you need stronger pistons. Without getting into the specifics or a debate, generally the block MUST be sleeved with iron sleeves in order to run aftermarket forged pistons.