All of the top cordage makers have great products. New England, Samson, Yale, Marlow, Maffioli etc...... they all produce a wide selection of rope products to match the application....They're all good, so, you need to be more specific in you application intentions... Here's a good link to get acquainted with the different offerings...
http://www.apsltd.com/c-1485-line.aspx
Now, if you're a daysailor with moderate experience you will probably have only looked at the polyester double braid type of line.... New England Sta-set is the most common because every West Marine store carries it.... But Samson and Yale make polyester double braids also... and they are great.... so... if it was me, and I was buying a lot of new sheets, I'd price shop it because they will all do the job. Don't forget that some makers charge extra for solid colors...
Now for halyards or tacklines where you want NO stretch... you will want a different type; lines with vectran or technora cores, for instance..... again, all he major companies make these products... so keep price as a major consideration. The most popular of the high teck core double braids.... where the cover can be stripped away from the non handled section of line, if desired, is Samson Warpspeed... but Yale and NE make similar products... on a boat your size... expect to spend a lot of bucks on new halyards if you go the hi tech route.
Finally, I can tell you what NOT to buy.... DO NOT buy any kind of line from a hardware store unless it's a recognizable brand name of marine line, such as those already mentioned(which they won't be). Even though it may be polyester double braid and look like the line in the marine store... it isn't.. just read the specs on the label and compare to the brands I've mentioned... all quality line will supply the specs... in the chandlery it will be displayed right by the spool for each line. I would never purchase any type of line for my sailboat from Harbor Freight, Lowe's, Home Depot, etc.... just for the sake of saving some money.... just don't do it.