Not sure if you've ever been to Nosara/Playa Guiones, but you'll have a great time! I've actually been going there for the last three years.
Everyone really cool and the breaks are really consistent (the local tell me way more consistent than Tamarindo). If you haven't check out www.surfingnosara.com. They have had some serious swells come through this winter.
As for other places to surf, the whole Nicoya *****ula is really good.
i just came back from there if u headin to the south definitely check out this place called domonical its a good break with big waves but make sure you go at LOW tide or its horrible if you go up north then Withes rock is good but alittle crouded ollies point is a good place to check to but it;s only acesilble by boat but its less crouded PLAYA NEGRA is a pretty decent break also