I've been thinking about getting this lens for about 6 months or so, but haven't got around to it yet. I plan on picking one up in the near future, but I'm concerned that one I buy it Nikon will introduce a replacement shortly after. It's been around since 2003 or so. Anyone heard of plans for a replacement? I searched the net and didn't find anything. I have no doubts about its quality or performance, which are both superb.