Save your money buying the more expensive brands and get yourself loaded up with Mullarky's Bulk Spools: http://www.mullarkeys.co.uk/fishing/hooks-lines-and-swivels/Match-and-Feeder-Fishing-Monofilament/0/mullarkeys/
It's about the best reel line on the market in my opinion, and I've tried a lot over time, and only 2.99 for a 2oz spool [:T]
PS Mullarkys are not a paid sponsor nor have any connection with MD's, I just feel that a good product is worthy of a good recommendation [^]
Contrary to popular belief, you don't ALWAYS have to re-cast every 10 seconds.
On bigger, open waters when better carp are not really "'aving it",
it can pay to fish 6 feet deep and let the float drift slowly.
And if there's anything other than a wind directly behind you, that means a sinking line.
I use the Gardner Hydroflo, Pitindall, and I like it...very, very limp. I use it on a centrepin as mainline and I've made a fair few rigs with it too. In a back-room test it sank as quick as the old favourite Maxima Chameleon.
The other favourite is the Korum Reel Line, limp and just as quick to sink, especially after it has been dunked a bit.
With any waggler line it pays to load it onto the spool through a wet sponge with a tad of washing-up liquid on, to de-grease it.