With your mod's that's probably about optimal. I'm running 36# currently with more mod's (S blower, head work, double IC) and will probably have to upgrade to 42# to meet my goal of getting into the mid 13's with street tires. You'll need to flow a lot more air to need more than 38#.
So you are saying get the 38 lb injectors? I guess what I need to know is that with the mods I have are the stock injectors at the limit? If I bought the injectors I would be planning on running the C&L sample tube. I have heard both sides of the sample tube vs chip. I beleive the hip would be better but a lot of people were very happy running 38s and a tube.
38's won't hurt and give you a little room to mod some more without change. Some head work, SC upgrade - we never seem to be able stop once we start. And yes, that is injectors AND sampling tube.