Guys i really think you are worrying about very little. I've used twin steppers and it was fine. I have belts running my machine with a single stepper on the X axis. It works great for the home machining i do......But! i have two ballscrews sat there ready to change to once i get round to it. If i can make a belt fit to control the screws from one motor then i will, if can't then i will just use two motors. Stick to your budgets up most and don't let bling go to your head. At the end of the day you are machinists now whether you like it or not, your nature will want you to change things later. There is no right or wrong way just preferences? I like both!