Hi Ron. Most of the electrics out there for less than $350 are likely gonna be pretty similar to the MES in size and quality. As you might expect, bigger, better rigs cost more. I've read decent reviews from members who own 2 brands of stainless steel smokers that are clones of the much more expensive Cookshacks: First are Smokin-It Smokers, but only their smallest model is less than your budget (3 models priced from $290 to $500). Second is Smokin' Tex, but again, a little more money than your budget (smallest model is around $400).
I guess my advice would be that if your budget cap is a hard 350, stick with another MES or similar rig. I used to cook on an MES and always turned out good food. But if you could swing it, there are some higher quality smokers available for a little more money.
Hope this helps...Good luck!