Re: I need help chosing pick-ups.
Welcome Graves!
If you want a very versatile set you could go a few routes. Go with a High Output bidge pup and a vintage output neck pup, or go for straight up versatility.
I would recommend the Jazz for the neck regardless. It is very clear and articulate and can handle lower tunings as well as standard tuning. It sounds good clean AND distorted. I would also suggest a 59 but in an SG it might have too much bass and sound muddy.
For the bridge pup you could go a few different routes. A JB, C5, Custom, Dimebucker or Distortion. The first three versatile pups that can and do cover a broad range of tastes. The last two are the Chugga Chugga, grind it out and take off with some lead pups.
JB-sounds great clean and distorted. It uses an A5 magnet and is a brighter pup with a high mids spike that effectively cuts through.
C5-like a PAF with an Alnico 5 magnet that got left on the winding machine a little too long. It has a scooped mid and great lows and highs, and sounds similiar to a 59. This would be the hit or miss pup.
Custom-like the C5 but with more mids and les bass. It has a ceramic magnet and produces great crunch and lead tones.
Distortion-a high output pup but with useable cleans. It has an oversized ceramic bar magnet that contributes to the output. Lots of mids and harmonics.
Dimebucker-a high output pup with rails (for full volume while doing bends)and a ceramic magnet. Think the tone from the late great Dime.
Finally....
Invader-another high output pup that might sound dark, due to its nature, in some guitars. It has 3 ceramic magnets and an aggressive winding. My gut tells me that a solid mahogany body might not be the best wood for it.
If you'll tell us what amp/s you use we can further help tune you in to the right pups. Hope this helps!
Luke