Sumi (my apologies if this is an unacceptable shortening of your name),
I've been mildly tuned in to your quest for the perfect device for about a week now. I think you're going to be hunting for quite some time, if this is the case. The only way to figure out if you like something, or if it's perfect for you, is to actually use it.
There isn't a single, hands-down, absolute best piece of equipment out there. You have such standards that it almost seems like you will need a custom mod made just for you, to your specifications. But, here's the catch: if you haven't used anything besides an ego and clearomizer, how will you know what you like or don't like?
So, seriously: just pick something and buy it. I don't know what your goal is, picking out these high-powered devices, but just pick something and start using it.
Even if you do find the perfect device, there's going to be a learning curve to getting it to work as well as you're hoping. Your first coil will, in all likelihood, pale in comparison to the 5th coil, which will be improved upon by your 20th coil, and so on.
If I were you, I'd get something high-powered and regulated for myself as soon as possible and get learning. Then, when the birthday rolls around, graciously accept a backup, and/or another RBA/RDA.
You will probably not be producing world-class vapor the second you get the IPwhatever, so just get something and get started.
But, that's just me.