Any step up from the Gem Pro will have to be an Electromagnetic Force Restoration scale, rather than one that uses a strain gauge. The entry level models include the Sartorius Entris 153-1S and the A&D FX-120i. Both are made over seas in Asia, but get solid reviews.
The only entry level MFR scale made in the US (Denver,CO) is the Scientech ZSP150. They use some sort of patented proprietary system that allows the scale to survive an incredible amount of abuse. I have thier SA310 analytical balance, and can vouch for both it's accuracy and durability.
For the first two, brand new from a retailer, you are looking at $700. For the Scientech, about $1000. They all occasionally show up as used surplus from Universities or Labs on Ebay.
However, the Scientech is the only one that you can send back for refurbishment, at a reasonable price, by the folks in Colorado.