@katmandew
caches on the 1240 are probably why you get compatiblity issues with whdload. tweak some of the game icon tooltypes.
AGA wasn't really taken advantage of by games, but AGA versions still look better than ECS.
Serious software that runs much better on AGA than ECS and for which RTG won't work (or work well) include Dpaint, Brilliance, Scala, and playback of animations. There isn't anything quite as good as these in RTG. There are probably others.
Sure you can use photogenics and ImageFx better on RTG machines, but then a PC will do it better still for less than an RTG Amiga
I still think an A1200 like you have is pretty cool: small form factor, composite out built in, easy to expand, heaps of games. Its when people turn A1200's into Frankenstein machines- and really all thats being attempted is to create an A4000- that I think people lose it. i presently have an A4000 with 68060, scsi, CV64, scan doubler, and i use an A1200 with just an 8 meg ram card and a flash card more often: I love its fast boot off flash card, 100% comaptiblity with my whdload games, my son loves to play with dpaint and scala