Once more, thanks to sis for this tip. $10 sparking here, and to use a well worn phrase, "eminently quaffable".
Segura Viudas, cava basically. Just got a write-up as part of a larger article on inexpensive bubbly.
Consumer Reports via
Liqurious. As with
Russian Standard, the bottle art and label may not inspire, but proof is in the pudding.