I I were looking to buy a new feeder I would try to get this one - >
https://www.shopgearinc.com/products...variable-speed
More than the Felder you mentioned, but I have seen some videos and it looks amazingly convenient and quick to set up and adjust.
I have a shear cutting rabbeting block from Amana that I really like and use all the time. It was around $250, I think. Adjustable groover are nice to have as well. Whitehill is also a very solid brand with a lot of options. So is Rangate. So many options for shaper cutters and heads.