Saddlebags for racing bike

I'm taking my road bike to Greece for a week round Athens and Santorini and need some storage space, I'm thinking one of these as my Cannondale has no rack mounts or other eyelets:

http://www.wiggle.co.uk/p/cycle/7/Ortlieb_Large_Saddle_Bag/5360007523/#more

I don't want to wear a pack as it's well hot. I need something that will go with a more modern bike (no Carradice or anything) what I take will be determined by the size of the bag I'm taking, does anyone have experience of using a large saddle bag with a road bike? and does anyone know of anything larger/better for around the £40 mark?

That looks quite good - you dont want to get that much of a larger bag, otherwise the temptation is to take too much and end up with a bike that is not balanced well and is no fun to ride. (A problem I have had with my Carradice.)

I would guess that panniers are the way to go if you want to take a lot more stuff (lower centre of gravity), but again not ideal for a modern racer.

Just pack well, take the minimum you need and travel light.

i've got one of these:

http://www.sjscycles.co.uk/product-Carradice_of_Nelson-Carradice-Super-C-XL-Saddle-Pack-6312.htm

i think it works really well..... it's made by Carradice, but is a more modern style to the normal ones.

got enough in there for an 80 mile ride and an over night stop at a mates house.

Having just got back from a cycling trip in the alps, I saw a number of Rixen and Kaul Freeracks out and about. They look the business and very stable. Much more so that a large saddlebag. You'll need either a dedicated back to go on top ("Rackpack") or some people just used bungees and wrapped all their stuff in a canvas bag.

http://www.klickfix.com (under the "For Seatpost" section).

I'm now well tempted to pick one up myself!

And, indeed, their Contour Max system - lots of those about too.

You could also consider a barbag. They have the upside of keeping your stuff near to hand and so are good for things like cameras/food/etc.