I know, it's such a great feeling. I was over the moon when I bought my PS3. I usually don't enjoy things as much when I've paid and arm and a leg for it, but that £320 I saved up was worth it. I might not have had a HDTV, but the graphics still blew me away. I had a pretty similar feeling when I first bought my TVs too, from 15 inch SD, to 19 inch HD and then 32 inch HD.
I'll probably have a similar feeling when I buy a Playstation Vita, although it won't be like when I buy a new home console. It doesn't feel as fresh after playing one and hearing everything about it on the internet.