Hi Stressboy. Good thing you found the premier website on the internet for classic Amiga systems. Most any kind of question you have can and will likely be answered, no razzing for even the dumbest sounding questions.
You basic stock Amiga1200 only comes with a Motorolla 68020 processor and 2 megs of ram, which will work fine with quite a number of games, especially older one.
The most common accelerators are the Apollo and Blizzard brand and come mostly in speeds of 68030 and 68040 at various mhz's. There are 68060 accelerators, but they are very expensive, and not worth it just for playing games. Both the Apollo and Blizzard will allow you to also install a SIMM memory chip from 4megs all the way up to 128megs. 32 and 16 megs will give you plenty of memmory.
Harddrives are simple, any 2.5" laptop IDE drive will do. Just, you have to partition it in a special way since Amiga can't handle sizes above 4gig.
Thats the basics. The best source of all the hardware thats been made for Amiga is
www.amiga-hardware.com if you want to see what you're buying.
The best program to use with games is WHload which you can get here
LINKAnd
www.aminet.net is the top site for public domain programs.
Have fun!