sRGB is horrible. It was designed as the least-common-denominator colour space for *CRT* monitors. Not only is it a narrow crappy gamut, but it's inappropriate for LCD displays.
In any case, unless you bought a rather high end display designed for colour work, your monitor won't be factory-calibrated for sRGB, it'll have a canned set of pixel gains pre-configured for the entire production run. At best these will be inaccurate; most of the time they're totally bogus.
sRGB is not the answer unless you do no colour-sensitive work whatsoever. Even then, it's ugly.