Nice-looking bike there Martin. It's actually a 98 frame, not 99, so a slightly higher quality as it has Reynolds stays as opposed to the generic stays on the 99 frame.
Design-wise, I would expect it to have super-fast or twitchy handling, with the Indy and such a short stem. I would suggest a red 99 SID XC as a better alternative - a better fork and usefully longer to bring the handling back within normal bounds. Unless your wife likes super-twitchy handling of course!
Why would it be twitchy? These came with 415mm forks, did they not, and the forks on there at the moment appear to be pretty long travel. I don't think you'ld want them any longer.
The saddle is pretty layed back though, so fitting a slightly longer stem and sliding the saddle forward should help the balance somewhat.
The last of the proper Explosifs; Nice!
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