[Leica] R 250 Telyt for my Nikon D700?

[cummer at netvigator.com (H&ECummer)]

Hi Luggers,
My Leica camera equipment for travel is beginning to divide into the  
M8 plus wide angle lenses (down to the 18mm Elmar) and at the  
telephoto end I am increasing my R inventory. I have the Canadian 90  
Summicron and the 180 Apo Telyt f3.4 (both famous Mandler designs)  
already re-bayoneted for use on my D700. I have just acquired from Dr.  
Yao a complete and pristine 400 f6.8 Telyt (as recommended by Doug  
Herr - thank you Doug) and am in the process of getting the bayonet  
changed on that lens. This has been complicated by the fact (which I  
have transmitted to David Lladro at Leitax) that later 400 Telyts have  
different cams that the single cam for which the Leitax bayonet has  
been designed. Still I am getting it done.

My question is this. I have the opportunity to pick up a 250 f4.o  
Telyt to augment the telephoto set above and I am wondering if I  
should. I am getting all this telephoto fire power to take wild life  
pictures in  Bali and Australia.
What do you all think? TIA
Howard (in Hong Kong)