I really do love my a3000's and my a2000's and my a500's , but I'd trade one of my a3000's for a decent a4000 or even a decent a1200 no problem, just so I could have an AGA machine.
It seems to me you miss out on a lot of great Amiga stuff if you don't have the AGA, but I wouldn't go so far as to say that OCS or ECS Amigas are comparible to a C64, they have much better games, apps, and graphics which blow a C64 away any day.
So for me I'd have to say either a towered a4000 or even a towered a1200 would be the best Amiga.
Any one local to me wanna trade ?
hmm... probably not, but I guess it doesn't hurt to ask. :-)