insulating existing finished basement

Hello all, I purchased a home a year ago. Half the basement id finished and is used as a rec room. I had to cut a hole in the drywall to investigate a pipe. I noticed that there is no insulation iside the dry wall and basement walls. I'd like to refinish all of the basement and and wonder if i should i try to insulate them? If so, can i use the blow-in insulation or am i screwed? Any other options? kudos steve
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.