Eimei. Keirin frames are retired for a number of reasons, but the number one reason is that it was involved in a crash. Now, chances are good that there was no real damage, but getting bashed at 40mph on a concrete track can't be good for a frame. 200 dollars is certainly worth not having to worry if some of the brazings got cracked in an impact.

Makino probably impresses your friends more, but, like you said, the Eimei is the one you actually want. When will you have the opportunity to buy a new one again?

...oh, you'll be racing this bike, right?