I have to agree with Nads, you truly need to look into everything that is out there pump wise before you commit and know the positives and negatives of each pump. Traditional pumpwise the best two on the market come from Animas in the form of the Ping and from Medtronic in the form of the Paradign 522/722. I truly do not know much about the accucheck nor has it come up on the forums often so I cannot comment on either. As for the non-traditional there is the omnipod system. Gina has a comparison of the various pumps out there and there are sites that try to give a better comparison than the manufacturer websites try to do.
I have the medtronic pump right now, but also have sitting in a box the Ping awaiting training. They are both great systems and either works amazingly. The Ping has features the medtronic pump does not such as the meter can also control the bolus dosing and it has a color lcd display, can give a smaller basal dose if necessary. The medtronic pump can hold more insulin if necessary, has the ability to be integrated with a CGMS system that medtronic offers, and can also be controlled by a remote if you want but it is a separate accessory and costs over $100.
The omnipod is a tubeless pod that sticks to your skin and is controlled by a PDM which is also your meter, like the ping. They just updated their PDM to a better functioning device with a color screen and other things as well. What is nice about the omnipod is that the pod is on you and you are not tethered to a pump with the tubing. It holds roughly the same insulin and lasts for three days before you need to change it. Right now the main complaints I have heard tend to be that the pods don't always stick (happens occasionly and infusion sets for the other two pumps can fail as well) and they can be bulky as well. The good news is that omnipod is in the process I have heard of shrinking the pod size down by as much as 40% and that will happen sometime in the next 6 months most likely.
Neither the Ping nor the Omnipod have the integrated CGM system that medtronic has however both companies are working with Dexcom to come out with the integrated system in the near future as well.
There are other things out there as well. But these are some small things. On the forums you are sure to run into many people who may be overly enthusiastic about their pumps and tell you why theirs is the best. In the end the decision is yours and you need to look at what the best option for you is as well.