anybody got any reccomendations for a rack mounted child seat for my nipper?
moneys not really an issue but his comfort is.

I'd go for a top-tube mounted seat any day.
The kid can see forwards, instead of looking at your arse all day, the balance is much, much better, [I remember a bike falling backwards when I stopped for a rest, with a child in a rack-seat] and you will both feel much safer with the child between your arms where you can talk to each other. If you get a top-tube seat, cut off the stupid back-rest thingy.
I put a roadie-style aero-bar on my MTB so my two could lean forwards better, but the perfect mod. was a fork with rack-mounts on the blades. I bolted some ally. footrests onto them (I'll give you a diagram if you want) and both the balance and comfort for both of us was great.

i'd prefer him on the back, i wanted to get an adaptor for my trailer, but wifey wont allow it, although its good enough for the dog, but not the nipper, so as a comprimise i'm going for a rear mounted seat.

Hi We had a similar problem and last October we ended up importing a front mounted one for our ten month old son from the US.  He loves it and is always smiling when we go out.  It is called an iBert safe T seat.  Might be worth a try.