I'd be willing to bet you a steak that if you like the way the 28 Cron renders, you're going to love the E46 Pre-asph 50 Lux
As you probably already know, the Chrome is about 10 times as hard to find as the black, but they are out there. One tip if it has to chrome and nothing else will do, is Leica made a special run of this lens in LTM -- Yes, thread-mount, as a collectible that fizzled. But it's the same optics and usually sells for 1/3 less than a comparable M mount version, just needs an LTM to M adapter. (For posterity in the thread, it was also made in Titanium, Black-Paint and Gray Hammertone!)
Cheers,