Any Suntour over pre 1985 Shimano stuff.
I'd go shopping for a V-GT Luxe. Really, one of the all time great derailleurs- and it was inexpensive enough to be considered "low end" even though it was a complete stud, not only for its time- but a completely all around good, high performance RD.
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*Recipient of the 2006 Time Magazine "Person Of The Year" Award*
Commence to jigglin’ huh?!?!
"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.