Not something I'd take on but you may want to ask the folks at gpsmagazine.com as it's their decision tree.
Rick James - Nuvi Forum Moderator Nuvi 350 - Nuvi 760 - Nuvi 1695LM - Nuvi 3790LMT (with ecoRoutes HD) - Nuvi 2460LMT - Nuvi 3597LMTHD (with ecoRoutes HD) also TomTom 540S for side by side comparison >> Here << 2010 VW Golf SportWagon 2.0 TDI Diesel
Would like to update that under the 24XX series, Garmin has a 2465LM which has similar features as that of a 2460 but a 4.3" screen whose orientation can be horizontal or vertical. The internal memory is about 2GB and the unit comes with a slot for a microSD card.
If I am to read the info in the first sticky correctly. The 24xx was launched 18 months ago? If so, did Garmin launch any new models within the last 6 month or were they all launched a year and half ago? The sticky doesnt seem to provide individual model details when they were launched.