I own a vintage Summit and it works flawlessly, day in and out, on every project that gets EQ. For shaping, tuning, fixing, tweaking, or slashing broad strokes- this is an animal of an EQ and is totally underrated. If you are buying used, listen to make sure it sounds good and get a good deal- they are pricey new but worth it, but due to being less popular in the USA, you can find GREAT deals.
Oh, my clients THINK I own Pultecs.... until I tell them it was a 200A!
(I also really like the Manley EQ-P's but you need 2RU for three bands in a single channel, versus two RU for a stereo, killer sound.
JvB