Maps, GPS or both?

I'm cycling through Austria, Germany, Holland and France in August and I'm struggling to find good maps in order to plan my route. Are there any you can recommend? Also is it worth digging deep and investing in a GPS computer? I'd prefer to spend the money on other things and hope for a little adventure along the way but if the majority say GPS then who am I to argue?
Cheers!
Cheers!
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I don't think you have to dig deep for a decent GPS unit nowadays. The Garmin Edge Tourer seems to get a lot of good reviews and you can have it pre-loaded with maps or put your own on there. I believe that you can put OpenStreet Maps on it which are excellent quality. I also think it's reasonably priced as well.
A downside to the Edge Tourer is that it can only be charged via it's USB port so you better be within range of a mains socket with a euroadaptor.
For a GPS, I'd recommend a Garmin eTrex 20, which runs 2 or 3 days on a pair of AAs, and downloaded OpenStreetMap mapping data. The GPS will be about £125 plus a bike mount (it's officially a hiking model).
Maybe I'm weird, but I like the challenge of trying to keep each day's route in my head once I've planned it - I managed to get down to the Alps from Exeter without GPS. Though I'll admit on Paris to Rome, one of the riders' GPS was useful for getting through complicated cities like Genoa, where all the signage goes to pot. But you still can't beat a map, IMHO - you get a much better idea of where you are in relation to all the area around you.
http://www.viamichelin.co.uk/web/Routes
I still use maps as GPS units seem expensive and the battery life isn't great.
I've found GPSs are great for pre-planned routes - which is ok if you've got somewhere set in mind - but on multi-day rides if you've got no set stop points and want to deviate from the course then the GPS loses some of it's value as the inbuilt route planning is not the best - although it will get you there.
However, if you do need to deviate from a pre-planned route then the active mapping can be really helpful.
If you're going without access to power then a solar charger with battery will help keep the GPS turned on - minimising the brightness on the screen, forgo the speed/cadence sensor and heartrate monitors and don't leave the unit displaying the map will preserve battery power.
Do you know what the eTrex is like to use on a bike? What's it like keeping up with the faster movement of a bike compared to a hiker? What type of resolution do you get on the maps?
Really enjoy navigating via maps though so sometimes leave the GPS at home.
I used my etrex both the h series without mapping and the hcx with mapping long before the edge series existed.
The etrex will have no problem with speeds and tracking.
The map screen is on a par with the edge mapping series.
An older etrex crossing the alps on the way to Rome.
http://s189.photobucket.com/albums/z122 ... =slideshow