Yup, Hindsight is always 20:20, but if you dont try, you dont learn ! :-D
/edit
this was in response to JoannaK, for those of us that dont like the threaded mode. :-)
I heartily agree with the sentiment of not waiting too long. I would also say to all those indifferent about Linux should get one if they have the dosh. (and are reasonably technically savvy you can make a bit of a saving) it is easy to use if you follow the instructions provided, and X (particularly Gnome) is quite intuitive (especially where windows isnt :-) ), and if that is still too much, get MoL.
that way (if you get in for the early bird) you will get Aos4 (eventually ! ;-) ) and you will already have the equipment.
I spent £700 on mobo, gfx, ram and cpu. that was about the price of an original A500 when it came out.
ok, that wasnt in kit form, but it didnt have a monitor either !
and besides, If I wont NEED to upgrade for 5 years, I'll be happy (I'll WANT to, no doubt, but hey, boyz toyz an' all that !)