It's not quite as user friendly as it could be, but CPU benchmark is a useful guide to CPU processing power taken, I believe, from multiple benchmarks of real systems.

It will not, however, help much beyond that - ie. no info about compatibility, power usage, CPU features etc.

Mouser: Count me in on the 4 pack please - if there is a copy left :)

I played Space Ace and Dragon's Lair on my Amiga 500 and although they were tough they seemed a little more forgiving  (at least in the early stages) perhaps because you only had to press a direction on the joystick (or the fire button) rather than click a specific (small) area of the screen.

That said, in the Amiga versions, there was no explicit instruction as to which direction to move - you simply had to guess based on the action and layout of the room!

A lot of trial and error was required, but the beautiful graphics made the experience worthwhile.