thanks for your reply spooky.
i have bought the gpsmap 62s today from rei.com. they have a sale at the moment and the price of 62s is $270 (comparing to $449 on garmin website). huge bargain. now i am comparing it with my old 60csx. in any means it is fast! there are some bugs in the software, but, i an sure that this issues will be fixed. i'll have a weekend escape to cape cod and will try the new 62s and compare it with 60csx.
by the way, they both use the same format of map.
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