If you consider building an all-beefed up-A 1000, also try looking for a Phoenix replacement-board ("A 1000 ECS+"), which also runs fine the old games, except a very few very picky ones. But these will have problems with the Rejuvenator as well.
Also keep in mind that not all Amigas have that daughterboard. I dont know if its a PAL/NTSC-thing, but only the first european A1000s had the daugterboard, soon they only had just one mainboard.
Have fun,
McTrinsic
