Yamashita's stuff is no joke. The "jirushi" is a good bottom level gyokuro in my opinion. It's around $20 per 50 grams right now. It still gives a good, thick mouthfeel and flavor. It was the star of our latest OTTI.
Going to 40 USD per 100 grams makes a HUGE difference, IMHO. There are good ones for less, but they are typically not what I am in the market for in Gyokuro.
Yamashita Jirushi, +1! This is also a great price considering that it was around 50 USD only months ago (caution, Yen falling zone) when I was purchasing for the Gyokuro OTTI!
I would add the two similarly priced offerings from O-Cha, Gyoku-Hou and Fujitsubo. Again, these were right around 50 bucks 4ish months ago, now with the Yen falling, they are also right around 40 USD. These offerings are quite different than Jirushi. So, if you want to try different tasting Gyokuro, buy a few selections.
Now would be a good time to go bargain hunting from vendors selling in Yen!