I wouldnt say that (since I have never compared), others would however..... I think H3dII is bogged in problems still, h3dI however seems to be still held reasonably highly as far as these things go. I have one and apart from when something goes wrong with my pc, dont have too many issues wth how it performs. You would be better to ask in the hcpc area about this and im sure johnad and jeff will give you their experienced opinions.
Jenz makes a scaler (which he sells - the Clarus) which has got at least one exceptionally happy owner (008 is the member in question), it is based on the h3dII so I assume Jenz has overcome issues in his own manner. But agai, it is £2000.
as i say, best to ask in the hcpc area, but dont mention the vision pro sdi because those guys dont like talk of such things!
ad