There are so many great string materials on the market now. 450,D-10,D-97,8125,TS-1,Astro Flight,Ultra Cam to name a few. String is made basically by two different manufacturers, BCY and Brownell. If you are shopping for price, D-97 is a good deal and a lot of places sell 1/8lb spools. 8125 is also a good deal for the money. 8125 is a a little thinner then D-97 and is available in 1/8lb spools as well( these seem to be the two most widly used materials by bowyers in recent years). If you look at either manufacturer's web site you can educate yourself on the proprietary differences.