Oh, I think I understand the question. Now you want a power-heli and something that you can't outgrow, skill wize.

I'm a beginner, so my expertise in this area is limited to what I read here on RCU and a few other heli forums out there. Here are some choices:

Bergen [link=http://www.bergenrc.com/Intrepid60.asp]Intrepid 60 3D[/link]
Pros: Metal or carbon everywhere. If you believe that you get what you pay for, then expect to get a fine ship. Another Bergen model to look at is the Intrepid Gas. I hope to own an Observer some day.
Cons: Just about the most expensive helis you can buy. If you believe that you get what you pay for, then...

Miniature Aircraft [link=http://www.miniatureaircraftusa.com/store/brochures/Tempest_3D_Brochure.pdf]X-Cell Fury Tempest 3D[/link]
Pros: Metal. The most beautiful head I've seen. Downright classy. CCPM.
Cons: It has the longest name of any heli I've heard of.

JR [link=http://horizon.hobbyshopnow.com/products/description.asp?Prod=JRP9051]Vigor CS CCPM[/link]
Pros: I've seen one of these fly. It is the smoothest flying machine I have ever seen. This is the only ship I know of that can be configured with the 140deg CCPM. Also, try to find a JR Sylphide 90. I haven't been able to track one down, but it looks like it is beyond the high-end.
Cons: You need a high-end radio to do 140deg CCPM. However the Vigor can also do 120 deg which many radios have. BTW, only Curtis would even notice the difference, but it can be fun to have something unique.

Thunder Tiger [link=http://www.onlyraptors.com/raptor90std.htm]Raptor 90 STD [/link]
Pros: The obvious choice for the cost conscious. Still, this is what Alan Szabo flies, so it is definitely good enough. Spare parts are available everwhere (unlike the others above). Upgrades are made by everyone and can be found anywhere. Also see the Raptor 90 SE with a fist full of upgrades.
Cons: At half the price of the others, I can't really think of any cons that matter.

Honorable mentions:
[link=http://www.quickheli.com/photos60.htm]Quick Worldwide Quick 60 Pro[/link]
[link=http://www.centuryheli.com/products/helikits/cn1100Predator/index1301.htm]Century Predator Max 90[/link]

In the end, only you can decide what you like to fly. Check all these out. I would love to have any of them.

-Mark