I like you I was deliberating between Irish tours, mothers milk and possibly apaches. In the end I went for the irish tour set and love 'em.
Although rory gallagher maybe more generally known for his awsome biting distorted tones he could still get your classic generic vintage strat clean tones that rivaled all the other big gunners - Hendrix, SRV, Clapton, Gilmour et al ........ so don't let that put you off seriously considering them.
Don't forget that pups will only get you so far towards a particuler sound......... there's your tone volume settings on the guitar....... your choice of amp + amp settings........... string/pick guage etc. and most importantly you and what you do with your little pinkies !!
I guess the mothers milk and irish tours will come to a point sound wise where they overlap according to your instrument set up but then head off more in opposite extremes .........i.e. mothers milk slightly sweeter cleans - irish tours capable of more powerful distorted type tones, but I reckon they'ed meet in the middle somewhere.
I'm sure can get Mothers milks to howl and scream when you want them to, like wise you can get Irish tours to clean up nicley and give beautiful classic sparkling tones.
Hope that helps ?!?!?!?!