Part of the problem is only a few brick and mortar stores carry the new Ibanez basses- I know my local GC has none of them.
They don't have the SR650, SR750, any of the Talman basses, TMB100 and TMB300. I also wanted to know more and get my hands on the SR750.
Very little info here and elsewhere on the net in terms of reviews. Other than that videos posted by Nobody above, hard to find any review videos.
There was a thread about the Talman basses but only a few people actually bought one as of yet, some have returned them due to quality issues (whether through shipping damage or from the factory). A few people love the Talman basses - I finally got to try one at another store and actually loved it.
It's inexpensive and would fit my needs for a beater bass - prices are $199 for TMB100, $299 for the TMB300. Differences in the bridge pickup and also the neck inlays and binding.
I happened to find a "scratch and dent" special on Musicians' Friend for the TMB100 - $127. I ordered it and it just got shipped out today. Curious about it.
What I like about this bass, well - it's what you'd get when you combine features from Ibanez, Fender (Squier) and Yamaha. It reminds me of a Squier Jaguar with an Ibanez touch in the electronics along with a thicker Yamaha RBX neck. The one I tried sounded pretty good for a bass in that price range. I imagine switching out the pickups will make it even better, but that's in the cards for the future.
I bought my SR650 at a local GC...not sure whats up in your neck of the woods. They also had a 755 as well.