You can probably upgrade your Minimed pump to the newer version (the 723, which is the Minimed Revel). I personally think Minimed is a great pump. It's incredibly durable, has all the features I can think of needing, and great software. I've found my Revel to be incredibly durable; it has definitely withstood a fair amount of abuse. That said, if one of the other pumps out there seems like a better fit for you, you should look into it. There are more choices than ever in insulin pumps, including the new t:slim and Accuchek Combo. I know many folks like the Ping and it's comparable to the MM Revel, but with a bigger screen and being waterproof.
Why did the last doctor pull you off the pump? I've never heard of a doctor forcing someone to go off a pump.
The pumps will not differ significantly in control if it works for you, it's how you use the pump : How careful you are with testing, carb counting, how well you tune your basal rates, I:C and ISF ratios that makes the difference. It's just a tool.
I think you made a good call to change doctors! If used properly a pump will lead to better control simply because it gives you much finer grained control over insulin.