These days there are as many different varieties of turf as there are streets in your neighborhood! This often makes it hard to choose what's best. Each year, new strands are developed and though I believe some have merit, I feel it has a lot to do with marketing. Cross a few varieties together, put a name on it, and you have something your competition doesn't. Here's my suggestion. All the main varieties (Centipede, Bermuda, Zoysia, St. Augustine and Bahia) have distinct characteristics while many sub species have similar characteristics. Some are better in shade…some have better traffic tolerance…some do better in periods of drought and so forth. Study on the main varieties and choose one that best suits your needs. Second, find someone that has GREAT grass!!! Many of our competitors grow a premium product. However, there are as many that don't. You should expect sod to be fresh cut (no yellowing or browning) have adequate moisture, have a solid dirt backing, be disease/weed free, and hold together when you lay it. Unfortunately, there is no correlation between price and quality so your best bet is to go look at it before you purchase.