flash needed

[Matt Bevers]

So, this weekend I was down in Washington, DC, taking a bunch of 
photos.  My brother works for the Secret Service, so he got us a tour 
of the the White House.  We weren't allowed to take photos inside the 
West Wing (we saw the oval office and cabinet room), but we could shoot 
in the press room.  Unfortunately, it was absurdly dark in there, and I 
probably didn't get many usable shots.

This brings us to the point of the message.  In the midst of taking 
photos in the near dark, my wife says to me, "I think you need to buy a 
flash."

So, I need to buy a flash.

I've got an MX and an ME Super for right now, but I could see myself 
getting a Super Program for flash use, or even an AF Pentax by the end 
of the year.  My question is, what do I get?

- A Vivitar 283 or 285: Is there any reason not to get the 285 instead 
of the 283, considering that the price difference is negligible?

- An AF280T - use auto with my MX and have a TTL flash if I get a 
compatible camera later.  I'm sort of leaning towards this one.

- Go for the gold and consider the AF360FGZ - this is definitely the 
flash I can grow into, but will it work my MX?  Is it worth the price 
considering it may be awhile before I can really use it?

- Is there anything else I should consider?

Sorry for the long post, but I'm pretty much lost when it comes to 
flashes and I can use any help I can get.

-Matt