I bought an ACA1221 (Full 32bit 020 version), fully unlocked it. Also sent it back for firmware upgrade to make 28MHz setting, 50MHz.
Had it running every day, 8 hours a day, for last 5 years and not one issue (at 50MHz, stays at 48degs). ACA cards are also handy as you can load roms from HDD, great for testing new custom roms.