I agree with Katrina on sticking with the same make of camera when you upgrade.
I am an amateur compared to Katrina and so many of the gals here who are like professional photographers, really. When I upgraded to a DSLR it was because I wanted to be able to take photos in succession of fast moving grandchildren. I, too, didn't want to make too many adjustments, but, I also wanted the capability of some day having more lens choices.
I had a Sony Point and Shoot (Sony Cybershot) that I was pleased with, so, when I wanted a DSLR camera I looked at the Sony Alpha 100 (there are newer models now) as a good entry level DSLR. The price was good and I have been very satisfied with it. For the first year I just stuck with the kit lens that came with the camera.
A couple months ago I bought on a new lens: a Tamron AF18-200 mm LD Asherical (IF) Macro. I love it!! This is my new leave on the camera lens all the time.
Here is a link to a layout with pics of my new grandson taken with my camera and my new lens.
precious baby - Digital Scrapbooking Ideas - DesignerDigitals