I have converted all of my 10-speed bikes to either 12, 14, or 15 speeds, in order to get sufficient range w/o undue gaps in the ratiometric progression. My favorites among my current setups are 50-42/14-16-18-20-23-26 and 45-42/13-15-17-20-23-26. The latter gives up just a bit on the top end, but serves me extremely well for commuting and general transportation. (I have never been a fan of really tall gears, anyway.)
If you can fund a Nervar Star crankset, it would complement the Stella nicely, and you can always adapt a road standard 130mm ring to the Nervar spider's proprietary 128, if you ever need to (been there ... done that ... works like a champ).
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069