If it's your hobby and if you can easily afford it, do it. Amazing camera and yes it also makes me smile when I get it out of my bag. In no way a collectors item to me.
I don't really care all that much what others opinions of myself and camera are. If I did, do you think I would have chosen Pentax? Of course, I jest. Some people choose car colours to make a statement, probably more choose because they just like that colour. They're still lousy drivers though
Seriously though, as it's your first DSLR, I would say invest in a couple limiteds and maybe a K-r for that price. You can then always get the inevitable silver version of the K-5's successor. This way, if you decide against this potentially expensive hobby, you can recoup easily. If it has to be a K-5 and you have a budget, then go black and a limited lens.
Either way, enjoy!