Pentax K5 or K 30

Hello Pentax specialists

Simple question :I'm thinking about buying a dslr for the first time after the analog period.Up till now I only used Olympus (an oldie CZ 4000) ,an Olympus pocket camera and since a month a cheap Pentax X5 just to get the feel about the trade again.

What would I buy a Pentax K 5 or 30 ?

thanks

Cees