I know exactly what you mean about impressions of 50s v 60s. My 1st love is the 60s end of that, but I like the 50s end as well. Yep, it sounds to me like Apaches is what you probably ought to go for :D
On the brashness front, I learnt something interesting about my ITs a few weeks back. I bought them for a Fender Japan 62 reissue, it's quite a warm sounding guitar. I recently got a 60s Roadworn, which is a very bright sounding guitar. As an experiment, I swapped the pickups. The Roadworn's Tex Mex pickups brightened up the Japanese strat very slightly, and the ITs beefed up the Roadworn's tone. Output wise the pickups seem roughly similar to me.
So my experience now seems to tell me that ITs have more mids/upper-mids rather than a load of extra top-end. However, I think there are some folks on here that have tried ITs in a maple board strat and found them too bright (I've just registered that yours is 1 pc maple). I've never owned a maple board strat to compare, but I do have two maple board teles and one rosewood board tele, and I seem to sense a mellower vibe on the rosewood board one (bear in mind it's got an alder body instead of ash, and steel saddles instead of brass - so I'm aware there's more involved...).
What I'm wondering is that perhaps the 60s-ish sets in general, not just the ITs, will sound brighter in 50s-ish, maple board guitar? I don't know if anyone here has got Mother's Milks, for example, on maple board strat?
I'm just waffling (waiting for my wife to get home!) - but bottom line is that I suspect you have to go for Apaches, same as I had to go for ITs or Mother's Milks for my first strat set because the 60s tone was where it was at for me.
I would recommend emailing Tim though - based on what's been said already, he might have something interesting to suggest like 50s style but a touch hotter (ie Apaches with their Alnico III magnets, but a few more winds - not sure whether that's actually a sensible idea, just using it as an illustration!). Or he might be able to cut to the chase for you with a "no worries, standard Apaches is what you want..."