Becky, this is the price spread on the all-in-one Lenovo models I am recommending to you. If purchased through this site, they'll be drop shipped directly from MacMall/PCMall to your business. Click on the "buy" link here, then immediately on the "add to cart" link on the next page that comes up and you'll be able to complete the transaction, it may also say "click here to see the lowest price" on the next page, to receive the price shown below. These are the only three models right now I would recommend to you. In these situations, you'll be doubling the specifications on what you have right now, which is a good rule of thumb. Also, on the purchasing page, you do not need to select a service plan, Option 1 is a really sleek look I must say.
Option 1
ThinkCentre Edge 91z 7075 - P G850 2.9 GHz - 21.5 TFT
Option 2
Option 3