if you're planning to spend $ on the carpet (surface layer), then you should plan to spend $$ on the under layer. a good under layer will let your carpet last a lot longer. when you walk on carpet with good under layer, you'll feel a lot more comfortable too. 1 D* Q2 z! [; i4 E M' f% Y ) s h" J( E* sof course, this all depend on how long you plan to live in this house too.* m& p) m6 {% X& S& P6 @