I have older 1988 Miele road bike with Shimano (7 speed) 600 tricolor group set(hubs and all).
I got a pair of Bontrager wheels(Race Xlite)given to me.
I want to go to 9 speed, as will fit on rear hub. I have read plenty that say rear deraileur should work fine, as well as front deraileur. Big question is which STI levers should I look for? 205, ultegra?

Also what brake calipers would be good to upgrade to?(if I am understanding correctly, thus 600 tricolor stuff is old day equivalent to ultegra) just what I've heard.