Thanks, yes I don't want to go wildly aggressive after being hand held by Henson, but I do prefer the efficiency of the +++.. How intuitive and forgiving the razor is is defo a factor for me as part of the learning curve. I spotted a £100 preowned Masamune whereas a Ti BB was looking at £200+
Ah, okay. If you are using the +++ that's surely an indicator. I only tried the ++ Henson (before the +++ was available in anything other than Ti) and found it very inefficient compared to a traditional razor design, despite the stated gap / exposure specs. IIRC the Henson ++ specs are similar to a Gamechanger 0.84, but I struggled to get a shave with the Henson whereas the GC 0.84 is perfectly nice and efficient without being a monster.
You are going to pay a premium on any razor if you want Ti - probably double the price compared to brass / stainless. It is worth it to people who like Ti, and if you like the very light weight of the Henson you may feel more comfortable with it. Personally, I prefer the heft of stainless steel. Additionally, whilst technique counts for a lot, a heavier razor often feels more aggressive / efficient because you don't need to apply so much pressure to make it shave.
I have to say I am inclined to agree with @Mr Konrad Dundee on getting the Gamechanger 0.84. It isn't such a bargain in the UK and you will pay roughly double what a US customer pays for it, but it will still be 2/3 the price of any of the others on your list and it is a razor that almost nobody dislikes - mild enough to be a daily shaver for some, efficient enough to be a 2-3 day shaver for others. It could probably manage more, but I never tried!
I suspect you may find the Masamune a bit mild, whereas the Nodachi may be overkill. The GC0.84 sits in the middle. I can't comment on the Bird...I might buy one this month, but as happened last year, my eye is being drawn elsewhere.