Timbo,
I bought a Record 350 a couple of weeks ago - really pleased.
Prior to to it being delivered, I contacted Ian John of Tuffsaws to discuss which blades I needed for the type of work I do.
Whilst the guys (& girls) on the forum will happily provide loads of useful advice, I would suggest you contact Ian directly who will give you honest advice as to what you need.
I just detailed the type and amount of work I was likely to do and the reommendation was 3 blades to cover every eventuality.
Despite the Alan Holtham DVD extolling the virtues of Record blades, the difference in performance betwenn the supplied blade and a new Tuffsaw blade was patently obvious so depsite the temptation to mess about with the supplied blade, just change it when you get a new one from Ian.
Glynne