The answer to 'what sanitiser should I use?' might be as varied as 'what beer should I brew?' at least in so far as the fact that everyone has a different, and valid, opinion.
This link discusses the ins and outs of some of the most commonly used ones and how to use them:
http://www.aussiehomebrewer.com/forum/inde...;showarticle=18
My opinion (and opinion only):
The easiest I've ever come across is starsan. However not having actually used it myself I can't say whether or not it's super anti infection fighter. All reports I hear say it is though and it's literally spray and forget. 30 odd dollars gets you many many many brews worth of sanitation as I believe it is diluted from concentrate (by you).
My method is not nearly as simple but I've remained infection free so far (had a flavour issue resulting from this routine not being followed correctly once though). Mine is not as simple and quick and is probably overkill so there you go:
Mix around 1 cap household chlorine bleach with 5L water. Add 1 capful white vinegar. Make sure all surfaces are covered thoroughly. Empty.
Rinse with boiling or near boiling water. (extra sanitation and drives off chlorine fumes)
Mix sodium metabisulphite with water. Make sure all surfaces are covered. Discard solution. Allow equipment to stand 1 hour. (extra sanitation and drives off chlorine fumes)
Rinse with cold water. Use immediately.
Potential issues: Chlorine can result in horrible flavours in resulting brew if not rinsed out correctly, unless used at certain lower levels (I think 1mL per 9 litres but check that thoroughly - I could be remembering incorrectly). Rinsing with super hot water is the way to go.
Sodium met is toxic and bad for athsmatics and needs to be rinsed. If you rinse with tap water then you are potentially adding back chlorine. I live in Melbourne and the water seems to be ok but it's worth being aware of.
I'll be getting some starsan before the year is out.