as a stove collector I´ve got my Optimus No. 91 Tor/Purple Flame. It´s indeed one of the best ever made meth. stoves money can buy.
One stove just for the collectors box would IMHO the Simon stove: heavy and thirsty.
Other meth. stoves I´ve got so far: Optimus Tor, Trangia T27, Trangia T28 mini, homemade Westwind copy, Simon stove, Trangia and Svea Enmanskök both in st/st, Tatonka made Trangia burner copy in st/st, Enders bulky stove, several homemade stoves, Esbit in different sizes and some dust collecting kerosene stoves