By Lenn Thompson, Executive Editor When it came time for me to pick a wine for Wine Blogging Wednesday #70: Spain! hosted by my friends over at Catavino, it was a difficult choice. I don't have a ton of Spanish wine in my cellar, but what I do have is pretty interesting. First, I reached for some older Riojas from Lopez de Heredia, an old-school producer who makes some of the most interesting wines I've encountered. But, I tend to prefer trying new things when WBW comes along. But what? My local shops don't have extensive Spanish offerings beyond the…