What you need is more like NxT-1 (pronounced N by T-1) since a normal T-1 is 1.5 Meg this would make any combination 2xT-1 = 3 meg and 3xT-1 = 4.5 Meg, etc. You will find that almost any carrier in the area will offer a T-1 at about $400 per month. and you can get one and see how it works than add another and have it bonded with the first. If you decide that you can split the data running to EMC away from the other data, it may save you a negligible amount of money.
If you decide to get a bonded T-1 service start with 3 meg, this will require a specific router so keep that in mind if you start with a single T-1 with plans for growth in the next 3 years. A router can cost anywhere from $900 to $9,000 but you probably dont need to go crazy here. I am a Cisco Sales Engineer and of course would recommend that for all of the bells and whistles relating to security and the ability to upgrade to all kinds of cool and functional features in the future. You can buy a plain vanilla router that will handle your exact situation that isn't Cisco and still be happy.
I could go on and on about the features and what you can do in the future and that's all well and good. You would be smart to own your router so you have control over it. You may be offered a choice to lease the router where your carrier has control over it. There is nothing wrong with this, but if you want to leave them, you give it up as well. Also, owning your router allows you to make changes in the future that you will not be allowed if they own it.
One good name for a generic router that has many years of solid performance is Linksys which is owned by Cisco now and another is Evergreen. I'm not sure if you have any plans of changing your phone system or if you plan on moving your office space anytime soon, but those are important motivating factors in making your decision on what you buy now, even if that decision is two years off, it's worth considering some options.
Jim
Email me if you want more info.