We thought the Sony HX90 was a bit pricey at release--the Sony WX500 answers that with a bit more palatable price, but axes a lot of the usability features. Selling for about $410 at its first release, the Sony WX500 offers a big 30x optical zoom, making it a good option for traveling.
The WX500 and HX90 will have similar image quality--both sport the same 1/2.3" sensor and 30x zoom lens with a f3.4-6.5 maximum aperture. Both come with a five-axis optical image stabilization system, an excellent feature to have when using such a long zoom. Both have manual modes, though miss out on RAW shooting.
While you'll get similar image quality from both cameras, the pricier HX90 will be a bit easier to use. The WX500 doesn't have the pop up viewfinder, which would have come in handy when shooting in bright sunlight. The WX500 also doesn't have the control ring around the lens for adjusting settings, or the larger grip of the HX90.
The Sony WX500 still sports a tilting LCD screen, which will even rotate 180 degrees for selfies. The size is also excellent, considering the features. Battery life is a bit better than on the WX500 then the HX90, though not by much.
The Sony WX500 looks like it will snap pretty decent images for the category, but competition in this category seems to offer more value. The Panasonic ZS50 appears very similar and even offers RAW shooting, though doesn't have the tilting screen; since it's an older model, it's easy to find for under $400. The Nikon Coolpix 9900 has very similar features except a bit slower burst speed at 7 fps, for about $60 less. Both the Olympus SH-1 and Canon SX700 are much more budget friendly, though they don't sport quite as many features.