From a value perspective, it's Bronze Age hands-down.
Here's a recent break of Marvel Beginnings II for myself -->
3 boxes =
$50 TOTAL for $150+ worth of boxes
There's just too many ~$5-10 hits for MB II to be worthwhile outside of case breaks which can still be very hit or miss.
Whereas Bronze Age is loaded with nice sketches and $$ artists. Rumor is Rittenhouse really doubled-down on sketch quality/artists to make-up for the last two sets which are still being discounted/easily found. Also from my experience, set-building and selling is more profitable from Rittenhouse especially with sets that have parallels.
BUT, many above make great points so if value isn't your main concern... it's close. Personally, I still like Rittenhouse inserts more and hopefully they can continue to be innovative with more things like shadowbox.
Last edited by BHotz; 12-02-2012 at 06:25 PM.