blakkhar: Upgrade your 1240 (28.84 MIPS) to 1260/66 (87.71 MIPS), it is just CPU and voltage upgrade (card remains the same). There are guys doing this on professional level (for example guy called Stachu100:
http://eab.abime.net/member.php?u=13673)Nowdays almost all demos are done with minimal requirement of 68060/50, the 66MHz overclocked versions are even smoother. Then watching demos on real Amiga with 060/66 is pure pleasure believe me ;o)