Daddog,
I have virtually stopped playing WB now, and I flew it for close to 4 years. I changed for alot of reasons, including those already well dictated above. For me, price is a big issue, this is so much easier on the wallet, but also because warbirds had gotten so stale for me. Nothing new, same thing over and over.
I also came because alot of my online buddies came over, but I stayed for the challenge. The planes are more challenging to fly well, the flight models more realisitic (I think so anyway, never flew a real life warbird to know for sure).
HiTech and Pyro are good guys, flying online and interacting with the community constantly. This brings a sense of working together, molding the game into a great sim.
Give it an honest try, have some guys flying it help you get setup and up to speed and I think you will like it.
Good luck,
Dago