T.S.
I posted a similar question not too long ago because there are just so many different play sets on the market and we received a lot of great responses. One idea was to check out Craigslist, which we did and found some nice sets at a reasonable price, however, my husband was concerned about the hardiness of the set once we took it down to transport and then reinstall at our house. Then we received a couple recommendations for the SunRay set at Costco...this is the one we opted for and it is GREAT! The set is solid, sturdy, safe and has tons for the kids (three swings, a slide, a rock wall, a rope ladder, a picinic table, sand box and a ladder with nice big steps). The one downside is that I would not consider this an easy project to install - it took my husband and his dad a full day. Below is a link (it is less if you buy in the store):
http://www.costco.com/Browse/Product.aspx?Prodid=11257173...
Good luck and I am sure whatever you decide the kids will enjoy it.