Freestylin

Like Ground Buzzard has said about the refraction, Garmin is likely taking a purely mathematical approach to the problem of sunrise/sunset based on spherical trigonometry. When you have a good horizon, like when at sea, the sun is at a right angle to your zenith when it's lower limb is about 2/3's from the visible horizon. It is quite possible that the garmin unit uses that time as sunset since the sun is mathematically setting at that time. Additionally it is possible that the unit does not take into account the difference between apparent solar time and mean solar time. (see equation of time) To get it all correct the unit would have to have some additional almanac information which Garmin has probably ignored. Likely the response will be "It's a consumer grade product"

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If both the Garmins sunrise and sunset times are either too early or too late,(not one too early and the other too late) I vote that the Garmin unit does not factor in the "Equation of Time" http://en.wikipedia.org/wiki/Equation_of_time

Don't know where you live but Cabela's has the Oregon 450 for $250 right now. I think that is within the price range of the other units you mentioned.

I know you have not updated the list in a while, but I nominate http://garmingpsmap.wikispaces.com/ to be added for the 62 and 78 series Regards

I suggest you hook up your unit to your computer and use the web updater to bring your unit to version V2.80 Not promising that it will fix the 18 limit though. Enjoy

Use Pocket Queries on Geocaching.com

I suspect that you will find that the manual only covers some core functionality, perhaps 10-20%. Once as you get the basics down think about looking into 'Custom Maps'. The route list you speak of should be the 'Active Route' page in the main menu. Just keep in mind any item in the main menu can be put in the 'Ribbon' short cut. Again even the Ribbon ('Page Sequence' in the setup menu) can be configured different ways. I better stop. As a general rule push the 'MENU' button or the + and - buttons even when you don't think they would do anything. You will be suprised. Enjoy.