personally, i'm a whore for yamahas. i've been looking into getting the yamaha DGX-670 to replace my old DGX-530. weighted keys, midi capable, supports usb audio, has an lcd screen. also has a pretty broad selection of reverb/echo/etc customizations. there's also the DGX-660 which is the more budget-friendly version of the 670. the big problem tho is they're kinda big boys
the casio privia seems to get solid reviews and is a lot more compact, but it doesn't have all the features and the big soundbank like the yamahas do. but if you only want a solid piano experience, it's probably a solid option for you (and looks to be more affordable than the yamahas: those run for about $800 to $900 and the casio can be had for $579 on amazon)
check your local craigslist/offerup/fb marketplace. see what's being sold. look up the keyboards from those listings, see which ones stand out. compare prices used vs new. figure out which is good enough for what you want for the best possible price. (bonus points if you can haggle the price even lower)
this is also solid advice. also check your local music stores. a lot of them have good condition used keyboards for solid prices and you'd be able to test them in person usually
