Custom strat idea
There is a strong (and in my opinion valid) argument that you can not get a "true" Strat neck or neck/middle sound out of a 24 fret guitar. On a 22 fret guitar you put the neck pickup a little further toward the headstock, pretty much right under where the 24th fret harmonic node would be, and you get a lot of harmonic overtones and an overall richer tone out of the pup as a result. Stevie loved the neck and neck-middle pickup positions, and if you want to capture the SRV sound, you probably will need to use a 22 fret guitar to do so.
That being said, I spent a lot of time looking for a Strat that plays as well as a Jem recently and finally settled on a '96 Strat Plus - big honkin' frets and a wider, flatter neck than the average Strat, plus it's lighter than most and plays beautifully. I've even developed an affinity for the Lace Sensor pickups in it (for now, anyway :-)