Yes, I was reading that too. I agree, that's what I'll do for now.
As a matter of fact, I guess all I am interested in is that there is opportunity to improve WRT300N features. Since there seem to be, it's probably worthed to replace the old WRT54G and try this new one.
Mostly, am hoping my apartment will be better covered by the three antenna system.
As I have some experience with this, I'll share my impressions here.