Let the hive mind of Engadget get that for you.
"I'm in the market for a new phone and money isn't a limitation. I'm also not partial to any particular US carrier, but here are some of the features I'd like to have: WiFi, GPS, good coverage in lots of places, push Gmail (a must!), physical keyboard (a must!), a touchscreen, decent battery life and a relatively slim body. And please, nothing that has a fruit logo on it. No offense to the fruit fans, though. Thanks!"
K790a is a quad band handset with EDGE, K800 -- K790s twin has UMTS 2100. Sony Ericsson released its first HSDPA handset this week, peep it here: http://www.engadgetmobile.com/2007/03/26/sony-ericsson-intros-w580-z750-walkman-phones/