Whatever ski you go with, stick with the same boots. Find the boots that fit you best. I have more sets in Radar boots than anything other than my Reflex releasable boot setup, and really feel comfortable skiing up to my limits in their Vector line, up to their Vapor line of boots. I would not go lower than their Vectors. I have not found an HO boot I like other than the old rubber Animal boot, or their top Syndicate releasable boot.
D3 also make very good boots, but my only experience is in their Leverage rubber boot, and it was positive as well.
Are you a double boot, or front boot, rear toe skier?
I will always be a fan of releasable boots, like the Reflex, Syndicate, and even the Vapor used as a releasable boot, but that change may be something that you would want to sort out after getting comfortable in something you like and on a ski you like