Am contemplating the same. The only reason I haven't switched to Jepps earlier was because of the cost (don't expect much change from $700 for an initial issue). I use the company set at the moment, because my employer requires it - but a set of my own would be nice. Are they better than the AirServices products? I don't think so, but nor are they worse either - just different.
If someone were using them for the purpose of passing an exam (e.g. IREX or ATPL), I'd stay with the local product - as they are the preferred variety in CASA's eyes. On the other hand, if you've already got all necessary subjects in hand, and you have money to burn - go Jepps. It could be argued that they are in fact the industry standard, because so many regional and major airlines (both in Oz and worldwide) use them. It's worth noting that one of the questions on the Virgin Blue Application actually asks whether or not you have a set of Jepps. Food for thought...