I'm putting together a list for myself as a novice oenophile to sample and compare each of the "essential" varietals inexpensively.
Most seem to agree that the best Rieslings come from Germany, especially the Mosel-Saar-Ruwer region, and Alsace. This was the cheapest I could find here from that area.
This was the only chardonnay I could find here under $20 from Burgundy, France, which is where many say the most quintessential chardonnays come from.
This one is on the list mostly for sentimental reasons.