I agree! An A1200 is the business!
I have two of them. One is hacked nicely with a scandoubler/FF for use with a PC SVGA monitor.
The other I'm upgrading for use as a simple gaming machine to connect to my TV. I'm currently in the process of getting my hands on a nice 4MB fastram expantion for the trapdoor. No CPU upgrade just plain fastram. Costs total... For the A1200 I payed 30 euro (it is badly yellowed) the 4MB fastram 10 euro. The 350MB harddisk was for free at work :-) but I'm looking for a 4Gig one.
And I had to solder a SCART cable to connect the lot to my TV.
All in all you can have a simple game A1200 for around 50 euro.:-D
I don't think any other amiga model will be able to beat this. The availability of A1200 expantions is just too good :-)