La Folie = The Amazing. My favorite fine dining spot in The City.
Carneros Inn would be the better choice between the two. You're right in the middle of the Carneros Appellation wher you'll be within a few minutes drive from countless Pinot Noir producers as well as a couple solid sparkling wine houses (Domaine Carneros and Gloria Ferrer). Pinot producers would be Acacia, Bouchaine, Etude, Mahoney (there's also a tasting room near the Oxbow), and countless others.
In terms of dining you're also a lot closer to downtown Napa, where a lot of new restaurants have been opening up in the last few years. The Carneros Inn also has 2 dining establishments (1 is open B-L-D and the other just L-D), they're a bit pricey, but it's what you would expect from a resort.
Another benefit to Carneros Inn is being about 10 minutes to Sonoma, where there's also quite a few establishments to hang out at (Hopmonk Tavern for when you're done drinking wine and need some incredible beers). Top restaurants in Sonoma include Harvest Moon Cafe, the aforementioned Hopmonk Tavern (though more of a hangout), the girl and the fig, and LoKal (an eastern european soulfood / beergarden type spot that does some grubbin food).
On the flip side - the Solage is up in Calistoga, which is very much Cab country. However, you're only a 20-30 minute drive over the hill to Santa Rosa and the Russian River Valley. The RRV is home to some of the best Pinot you'll find in California, as well as a solid sparkling wine producer in Iron Horse in between Graton and Forestville. You're on a bit of an island in Calistoga, so expect a lot of driving to get anywhere, but it's far more scenic than hanging out in Carneros for most of the day. You could easily spend a day upvalley in Calistoga area to get your fill in, but there really isn't much to do at night up there. The SolBar restaurant at the Solage is pretty outstanding, however.