Go to lutron.com/LED, click on the "LED Bulb Compatibility Tool." After you select the options, you will get a page of compatible bulbs. I would uncheck "show only the best dimming bulbs" and "show only currently available bulbs verified by Lutron." You can also check "PAR" on the left to shorten the list.
There are a couple of EcoSmart (HomeDepot brand) models listed. I've generally had good experience with EcoSmart. There are some others brands listed.
The 6WCL has a low end trim setting you can adjust to minimize flicker and pop on/off. See Caseta advanced instructions:
http://www.lutron.com/TechnicalDocum...structions.pdf