Sorry iPad, you loose out....

So I have been saving my money artsonia money to buy an iPad for the art room but today changed that.

Last year when we finished our slab projects I said, " I am never again doing that without a slab roller."  Well time helps heal all wounds so I forgot about that statement... until today.  I am 150 slabs into a 300 slab project and my wrists, elbows and hands all are aching.

So what does anyone have to recommend for a slab roller?  

I don't have an unlimited budget (want to keep it under $350 if possible) but want to buy something quality that will work well and last.  I don't have a ton of room to store it but wonder if the table top versions are "user friendly?"  

I would really appreciate any feedback from anyone out there.....