Hehe, looks like I went too crazy with my questions and possibly scared some people away.
I just did some research when I got home and found out that HPI has killed the Pro 4 and Pro 4 Hara edition.

Apparently Hara doesn't race for HPI anymore. So sad because I really loved the Pro 4, all one time I drove it.
I also looked on NOVAK's site and found out the brushless systems I mentioned above are ROAR approved. But on here, Druss says they are not ROAR legal?

What is the difference between ROAR approved (per NOVAK's site on the system) and being ROAR legal?
I also saw that Xray has a rather over-priced car and I really don't see too much that the car offers to really make it stand out as a "be all, end all car" when comparing to the Tamiya TRF 416 (hell I still remember the 414 like yesterday) or the Team Losi TC5. I'd rather pay the money for the Tamiya TRF 416 since I used to play with a 414 and thought it was a blast and very well balanced and responsive. The TC4 was an excellent car too, but finding parts for it were harder to find in my area versus the Tamiya. I did not know too much about Hot Bodies Cyclone, since I only remember Hot Bodies painting bodies with cool designs. Looks like they really came a really long way! The Cyclone car really looks great!
So I guess it is a toss up between the Tamiya TRF 416, AE TC5, and the Hot Bodies Cyclone. They all seem really great. But which of those cars would take a brushless system well? I also read that some cars would not adapt to Brushless systems too well because they are too bulky for the car to handle, especially the NOVAK Brushless systems. Is this true? Would the LRP or Tekin (I thought they were long gone and closed shop) have better systems? Would they work on the Tamiya TRF 416, TC5, or the HB Cyclone? And are those LiPo batteries the same size as the regular stick packs? From what I remember, LiPo batteries are pretty lightweight. Would this affect cars too much?