Well I have the manual you talk of and it has proven to be very useful despite its foibles but it is expensive being that it is not a genuine Honda publication, it is quite good for a copy though, when I say copy it is purported to be a translation of the factory manual.
There are a number of sites that do downloads of manuals and for a lot less you could get the same information.
Also there is a lot of information on numerous web sites about the NSR range, I would go this way and save a hundred quid.
I have bought the Honda books and despite being in Japanese they do have a use particularly the Parts List which can be had for about a tenner on an auction site (No Names No Pack Drill), the manual is a good bit more but worth it because of the illustrations.
So for a little research you could save a significant amount of money.
There is also the info to be had on this company site for paid up members, you lucky people !
You pays your money and makes your choice.
Dux.