My response is not timely, nevertheless, several interesting restaurants can be found in Woodstock. Be prepared to pay a premium for many; however, you may find the food and atmosphere worth it.
Pirro's Restaurante
http://www.pirrosrestaurante.com
228 Main, Woodstock (815) 337-9100
This place has excellent specials that are always delicious and satisfying. The wine selection is thorough. Try the chocolate port! Also, Pirro's is now featuring live jazz every Thursday evening and sometimes on weekends. Why go to Chicago?
La Petite Creperie
http://www.lapetitecreperie.net
115 N Johnson, Woodstock (815) 337-0765
This is a personal favorite. The food is made from scratch and is really like French country fare. If you don't want to spend excessively, try the variety of crepes. The service is outstanding. You may also be treated to authentic French accordian music. Special dining events take place based on themes such as Mardi Gras, Bastille Days, release of Beaujolais Nouveau, etc.
Mixteca 1390 S Eastwood, Woodstock (815) 334-8460
Who would have thought Mexican food could be so fun? I really like the atmosphere and hospitality here. Plus, the food is homemade almost leaning toward "upscale." Try the listed specials as they are unique and tasty. The desserts are inventive and truly Mexican.
These are only a few, but others may have their favorites to add.