Shall i add a 200 companion some day?

[Confused]

I have read many times in these pages that the d 400 is quite an upgrade from the 200 model. But my case is different from most other users i believe. My 200 is only driving the horns of my duos which are 16 ohms with more than 100 db efficiency. My amp is set to 30 watts only and is running only at "idle speed" with horns.

Under these cirmcumstance will it make sense to add a companion or would it be smarter to use the money and replace my modded mini with a n 10 ?

Or a second hand D200 companion + a Melco N1A.  This would be cheaper than the N10 I think?  just a thought!