I have used west on several projects, even wood...even stitch and glue as well as the thin plywood skiff and a Reedville, VA family boat weekend boat.
While both system 3 and west are great, I go with West as the support is the best in the industry. These guys wrote/write the book on epoxy construction of boats. The product does what they say it will and if you run in to any problem, you get to speak to the most knowledgeable people in the industry. The problems I have had, have all been learning and self induced.
As denise says, 207 is your friend for strips, like their 410 is for fillets..
I learned, see above, to use quality rollers, clean cups, and accurate measuring and you can have outcomes approaching professional quality.
Best of luck, and building a stitch n glue is the best relaxation, I have found...it will be so nice when finished, you may not want to use it...