I've owned a Blizzard 1230 mkiv, 1240, 1260 and PPC. It all depends on what you want to do as to what board is better. The standard for any A1200 is the Blizzard1230 mkiv. It boosts the 1200 to the speed that it should have been at from the factory and is great for everyday use. The 1240 and 1260 are great if you are using more intensive programmes such as 3D rendering, art packages and FPS. Of these the 1240 is the most troublesome purely due to it's overheating problem so in a standard desktop 1200 if there is no ventilation for the processor you can expect a lot of crashes. The 1260 runs a lot cooler so is much less troublesome. Now we get onto PPC boards. If you are not running OS4.0 then these are the most frustating pieces of kit in the world. As before os4.0 there was no OS for PPC's the usefullness depends on the 68000 processor and finding programmes that work either in PowerUP or WarpOS mode. WarpOs is a misnomer as it makes you think it's a complete OS for PPC boards. It is not. It is meerly a more efficiant way of using a PPC board. As most software for the Amiga was written for the 68000 series of processors the PPC is basically useless unless you run things like QuakeWOS (which runs at a good frame rate but still depends on what graphics you use(AGA slow,CV64/3d is good at lower res). Some of the more recent games were written with PPC's in mind but the speed then depends on graphics. So in conclusion. The standard processor to use on a 1200 should be a 68030. When you go for a higher processor you should also be looking at graphics cards as well.