Help me choose components for a convoy S2+ triple

XP-L HI was made for these triples:
http://www.mtnelectronics.com/index.php?route=product/product&path=60_106&product_id=530

This optic:

Driver with your choice of firmware (I kept mine simple):
http://www.mtnelectronics.com/index.php?route=product/product&path=67_117&product_id=480

Buy your spacer pre-built:

…Or depending how hands-on you are, this is how I have built three of mine so far: