I do preffer the appearance of the cast over the stamped basket.
I've read it doesn't make a differnce with audio quality and I can't say either way.
Theres no doubt in my mind that the cost of going cast is worth it.
I consider my speakers an investment, one that should look as good as it sounds.
3 M80HP
2 QS8
2 QS4
ADA 1000-4
Seymour XD
7'x 12'x 21' cave
3 Paradigm subs