Yeah I paid $800 for my Landis 6x18 hydraulic feed.
Seriously, the tw-90 is probably the ultimate grinder where space is at an ultra premium, but if it isn't, you have to ask; can it do this?:
Do you want a Ferrari or an F-350 Diesel 4x4?
I hope Travis doesn't kick my ass if he meets me, I'm a huge fan of his work, but Chris' grinder is the most versatile, go anywhere, *belt* grinder I'm aware of. Unless, as I said, you need the surface grinder attachment. Which would be exceptional for blade work in a tiny shop.
Also on the note of Beaumont and lack of innovation: I think that is totally unfair. The KMG may not be evolving, but they've got a novel and very affordable dedicated horizontal grinder, the new disc grinder tool rest (ultra-slick), and probably 20 other things being sold indirectly that we dont know about. Also, I wasn't aware that paint was necessary to make a grinder functional. Guess I better paint over all the rust on mine.