@Runequester
To be honest unless your going to be doing things other than playing games on the miggie then an 030 is your best bet, but then again things like AB3D, Breathless etc... do run a hell of a lot better with a properly set up 060 system...
Only ever came across one game using WHDLoad that wouldn't work properly on an 060 board and that was Pinball Fantasies AGA, never heard or came across the problem Damion speaks of when using WHDload & an 060 and I've tested and play thousands of them...
Only thing I would say if your still not sure about getting an 060 is if your going to use a lot of productivity software like PageStream, Final Writer, PPaint etc... then the difference is night & day when comparing an 30 & an 060...
The SubWay board is one of the handiest boards to add to an Amiga especially if you need to transfer a lot of file between the Amiga and a PC or MAC, but don't expect it to be of any use with a CD or DVD USB burner as it's way too slow to be used with one of those...
One of the best things to add to an 030 board for productivity software is an FPU but I'm not sure if you can do this on your board, but the speed increase with an FPU on an 030 can really make most productivity software come alive...