My stock wheels were similar to your stock wheels. I switched to Shimano RS20s and finally got a good deal on a set of Aksiums. Both make a difference you will notice on your fist climb after mounting them. Wheels make a bigger difference than any other change I have made with maybe the exception of going carbon fiber. Lighter stiffer wheels will be worth it and the Aksiums are strong training wheels that will last you a long time. When you are ready for the next step in wheels they will cost you two to four times more.