Hey people!!

I'm a newbie to photography and wanted to buy a Pentax as my first camera. Ideally im looking for a camera that will do or have the following:

1) Allow me to have full manual control of settings i.e. shutter speed and aperture. So it doesn't have to be a manual camera, it just has to go competely manual when i need it to.

2) Lightmeter

3) Compatible with a wide range of lenses

I'd be grateful for any suggestions at all.....