Have had a 7088 since the first year they came out in 09 and have been very happy with them. The machines are a lot more beefy in areas that needed it from the 21-23 series. Final drives, belts, chains and axles are all how they should be. I would say if you like your 21 and know the machine and how to set it I would go with the 7088. I don't think you will gain much to any capacity with a 7010 over the 7088, but everyone's situation is different.