I have CN 8 and it even has most of the small gravel roads where I live(WV) I have the 60CSx and I love it had an explorist 200 so you will be greatly impressedI dont have the topo's but I really havent run in to a time when I needed it. CN8 has probably paid for it and the GPSr with what I save in gas I was a grab the gps and go, no maps or anything took lots of wrong terms but not so much any more the maps are a couple of years old so they dont have all the updates
Good Luck
might wanna check out this http://forums.Groundspeak.com/GC/index.php?showtopic=151544