The Chardonnays can be too thick and oaky. The Sauvignons are zesty. Some of the cheaper ones are too acidic which really ****s with my reflux. I find that the entry level priced ones are all like that so it's always nice to find a reasonably priced one that is zesty but doesn't burn on the way back up!
This one is as good as Cloudy Bay in Stan's opinion - https://www.majestic.co.uk/Goldwater-Sauvignon-Blanc-zid37069
.. we went to South West France for our hols last summer ... still got some of the local wines we brought back - Averyon region - local wines from Gaillac and Cahors some of which are absolutely superb and cheap as chips over there - don't seem to see that many in the supermarkets over here and the ones that are don't seem to be amongst the best ...
Have enjoyed Cloudy Bay SB and certainly prefer SB and even Pinot Grigio to Chardonnay but more of a red drinker myself, and if no reasonable priced Chateau Neuf or Nuit Saint Georges around, tend to veer toward a good Rioja for the more 'casual' wine drinking ..
