Pete, I saw a couple of smaller ones with dovetail columns on Grizzlys website if this is the way you want to go.
From personal experience I thought I could get by with a small mill/drill, and did for a while. I just worked to it's limitations, but I did find that quite a few jobs were getting sent out because the mill/drill was just too small and I ended up getting frustrated with it. So I ended up selling the small one to get a larger one, I found it cost more to buy the large one this way than if I had just saved a few more$$$ and bought the large one. While a larger machine can accomodate larger work it also has more mass and rigidity which is the biggest plus for the larger machine........Ian