Agreed with most of above.
Blocks are much better these days and smaller diameter line works well.
I think the best on the market is SALSA.
A high-tech version of the New England Ropes classic Regatta Braid. Your hands will love this new, soft, and exceptionally strong single braid, constructed with a blend of Dyneema SK75/Spectra 1000 plus spun and filament polyester. Salsa Line is easy to grip, and has proven to be a great kink-free sheet for larger dinghies and keelboats.
Also great for small boat sheeting for mainsail, jib and spinnaker/Hooter
And it is priced so you won't break the bank;
http://www.onlinemarinestore.com/store/pc/viewPrd.asp?idproduct=15783&idcategory=0