I think trying to "stay at the cutting edge" is now, more than ever, unproductive. Change happens in this industry much faster than it used to, and the incremental changes are just that--incremental. The word "value" has to come into the decision-making process at some point, I think, and chasing the latest, most popular cartridge cannot be defined as a value.
For example, at RMAF last week, I, as many here on Audiogon did, got a chance to listen to the A90 in the same system and on the same turntable as the new Allnic Puritas cartridge (in Steve Dobbins' room). For me, I really preferred the Allnic, which was sort of surprising based on all the rave reviews of the A90. I have a feeling the new Allnic will be getting a lot of buzz over the next year as the A90 did last year. Such is condition we find ourselves in! What will 2011 bring in cartridges? Who knows, but I think just choosing one and having the discipline to tell yourself you bought it because you truly enjoyed it should be enough. Such discipline will save money and heartache, but it will be tough!