I know you just ordered your apex, but I'll mention it anyway.
I own the Titan LX, it is a great regulator. I really can't think of any negatives about it.
I have last years model.
I recently got a Scubapro Mk25/S600, It's a great reg also. For the diving I do (recreational) I haven't really noticed a significant difference between the two regs.
It just goes to show how great of a reg the Titan is as a $440 reg vs. the $680 scubapro.
I wanted the scubapro, for a few different reasons one of which is that I'm getting ready to take some TDI courses. I'll be getting another Mk25/S600 soon for a doubles setup.
The Titan is probably the best reg out there for the price.
If there are some other intangibles that make the Apex or in my case the Scubapro more appealing, then go for it......which you did.
As for computers. I have the Dive rite nitek duo. I like it. There are some good deals on it, since it's been discontinued.
The only negative I can think of is that the backlight is a little weak. Other than that I've been happy with it.
Remember to set your gas mix prior to the dive.
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