Orange,
I can't speak for 1 & 2...never been to those resorts. I've been to Tabacon, though. It is a beautiful resort...like the "Garden of Eden," but very pricey. The hot springs are out of this world. If my memory serves me correctly, there are 8 or 9 different hot spring pools you can relax in. Some pools are very still and quiet while others have flowing water and mini-waterfalls. The pools are situated in a tropical forest at the base of the volcano, Arenal...an impressive site!
The climate is very cool and comfortable. Food and accommodations at Tabacon are excellent, and offer the perfect setting for a romantic getaway. The drive is a lot further than the Jaco/Quepos area (about 4 hours from SJ), but well worth the trip. Check out the site:
http://www.tabacon.com/home_i.html
Another option is to stay in one of the less expensive hotels in nearby La Fortuna. As your trip schedule permits, you can pay a daily admission and have access to the Hot Springs at the Tabacon resort.