I had an RTR1258 and was really impressed with it. It was heavy enough that it would go to the full 7 inches
in depth while tilling. I turned my neighbors small garden in two passes. The area had been a yard for years.
I've had an RTA1250 on my B2620 for about three years now. Besides doing several large gardens, I found it to be handy when excavating areas that I tore up with the box blade. It made scooping/moving/leveling the dirt a lot easier using the FEL.
Cheers,
Mike