For your hard-earned (but yet-to-be-determined) money, you'll get pretty much everything you could possibly want, spec-wise: 10Mbps HSDPA and 2Mbps HSUPA, 8 megapixel cam with image stabilization and LED flash, 3.5mm headphone jack, a 4-inch 800 x 400 display (a first at this resolution for a production Android device), AGPS, and microSDHC expansion.
ENGADGET: Sony Ericsson's Android-powered XPERIA X3 sorta confirmed by way of retailer