As many agents have encouraged, find a local Realtor to do some analysis. However, go a step further and speak with your financial advisor as well. If you don't have one, maybe it is time to get one or at least ask yourself what your goals are and see if having a rental property is a good fit with those goals.
Also you mentioned the rental market is a bit slow. I have found this not to be true, especially in high quality area such as 4S Ranch and the 92127 area.
Congrats on your new home!
Kindred Real Estate
CA BRE# 01402946