If I had wrenches that were getting me by for now but wanted better, I'd either save until I could buy a quality set or start piecing one together as others here have suggested. A quality wrench set is going to last your lifetime and even beyond that. I prefer Armstrong combo wrenches myself, a lot of people don't due to them being made under the Apex flag, but Wright, SK, Proto, Martin, Williams etc. are all excellent brands. If you are going to be using these wrenches professionally or even as a serious DIY'er, it will always pay to have a solid, well made set. Epsteins also offers a full set (SAE and Metric) of mixed new U.S.made brands. These are cheaper than a complete identical collection and might be worth looking at if you are not opposed to a non matching set.$200-$300 dollars isn't an unreasonable amount of money if you look at the investment as lasting your entire lifetime as well as making your work and projects easier to complete.