An sRGB workflow is a sound plan purely because it's very much the lowest common denominator all things considered. Just means if you can get it looking good in sRGB you can get it looking good in or on pretty much anything.
That said, you should be shooting RAW if your camera allows (which I assume it does if you have a colourspace option), which has it's own gamut. The question should be which should I develop into when processing RAW files.
Personally I work in Adobe RGB, because I have a very accurate wide gamut monitor which pretty much removes all surprises and because almost everything I retouch is destined for print. I also prefer having my master file as the best quality from which I can make lesser copies if needs be.