the fender custom shop offers several pickup packages..usually running between $119 and $139 for a set of 3....i like the texas specials and put a set on my MIM strat.
as for the noise - it's a common problem with single coils but that's part of the "character"/"personality" of the instrument.
i like EMGs because they're pretty quiet and have a great sound still.
you can try the fender lace sensors (they're ok if that's what you're looking for) or the vintage noiseless (dunno about these too much...).
your question is very general. there are a lot of great pickups out there, it's a matter of taste and how the pickups work with your guitar...
btw, you can also try some dual-rail or single-size-humbuckers too but they usually don't have the single coil's "personality"...
i have this set on a custom made strat style guitar: http://www.emginc.com/Pro_SL20.html
and i'm very happy with it, but it has a bridge humbucker so i don't know if you could use it without routing the guitar for it or if you want a humbucker there.
i have lace sensors and duncans on my ibanez and i like it too but it's totally different.
I've got an '86 American Standard Strat that I modified with 2 Kinman pickups in the neck and middle and a Seymour Duncan Hot Rails in the bridge....the Kinmans are amazing, unbelievable sound and completely dead quiet.
If noise is the only problem with your pickup, why not think about getting rid of it as much as you can first. Shielding will do wonders in this area. But on the other hand you are not happy with the tone, then only go with pickup change.
I will recommend sticking to pickups that are as close as possible to the original specs. A lot of aftermarket pickups eg. like hot rails, will alter the sound beyond 'Strat' recognition. So ask a lot and read a lot before getting them.
For me, I have a Virtual Vintage 54 which was a good replacement neck p/u replacement, only its a bit darker. Kinman, Lawrences are good pickups. Never never those twin blade humbuckers in single coil size. I personally have nothing good to say about those on a Strat. My personal point of view based on my personal music taste.
Texas Specials do sound good, but they are not the most noiseless pickups out there.
Before you go changing your pickups, try sitting or standing in some other place. The hum from my Strat used to drive me nuts when I was recording, then I noticed that if I just turned a little bit to the left most of the hum went away.
sometimes its just a simple grounding problem...you should have that looked at by a tech, or check the schematics yourself to make sure all is in order....you can buy thin metal shields that are fitted on your pickguard that reduce noise reasonably.... i had this old american tele that wouldnt shut up but a pick guard shield did the job nicely