Messenger Bag vs Rucsac

Dear All,
I currently use a small Deuter race rucsac to carry my bits and bobs over my 30 mile return journey. I ride a Tricross Comp through all weathers etc and I am of a "sturdy" rather than racing snake build.
Does any one have a POV re Messenger bag vs Rucsac as I fancy a change but not sure which way to go ?
P.s. I am not in for panniers, bar bags etc...
I currently use a small Deuter race rucsac to carry my bits and bobs over my 30 mile return journey. I ride a Tricross Comp through all weathers etc and I am of a "sturdy" rather than racing snake build.
Does any one have a POV re Messenger bag vs Rucsac as I fancy a change but not sure which way to go ?

P.s. I am not in for panniers, bar bags etc...
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You have much to learn Padawan.
Do or Don't ... there is no try.
You have much to learn Padawan.
Do or Don't ... there is no try.
Rucsac vs Messenger bag 0 votes
Rucsac
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Messenger Bag
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http://www.wiggle.co.uk/p/cycle/7/Inov- ... 360031758/
I can fit quite a bit in it including a fresh shirt and underwear if necessary. It seems to keep the water out and it doubles as a water carrier for non-commuting running & riding.
Race - Fuji Norcom Straight
Sun - Cervelo R3
Winter / Commute - Dolan ADX
Pinnacle Monzonite
Liberal metropolitan, remoaner, traitor, "sympathiser", etc.
You have much to learn Padawan.
Do or Don't ... there is no try.
Tried messenger bags; prefer rucsacs; viz. stability & weight distribution, aeration.
http://www.edinburghbicycle.com/ebwPNLq ... revolution
That looks like a really good idea for rides out on the Maxima where I want to carry a bit more than the saddlebag holds.
Viner Maxima, Tifosi CK7, Giant Bowery, Old commuter.
http://road.cc/content/review/12479-lezyne-messenger-caddy-bag