Another vote for a calibrated set of the 'Mules'. I had a set of 490R and 498T in my Les Paul and initially tried a set of 'Stormy Mondays'. These were great for Blues and country - any clean/sweet/detailed style.
Good heavens, I had not heard my Les Paul's true/sweet/clear voice until I threw the Gibsons and bought the BKP's !
When I then wanted to try a slightly contrasting set for my S.G. (I.E a little more ooomph - but not sacrificing the clarity and flexibility) - Tim recommended I move the Alnico II SMs to the S.G. as the looser sound would compliment the thinner body. For the Les Paul, he had no doubts that the Alnico IV 'Mules' would be optimum and flexible without losing the ability to still play 'cleaner' styles when needed. Many people on this forum (as well as Tim) have confirmed that the Alnico IV 'Mules' can handle overdrive with equal aplomb.
P.S.
I also found that taking out the 300K volume pots and replacing them with the 'vintage' 500K type did the BKP pickups even more justice. It takes the load off and lets them breath properly.....
I (eventually) found best results by using Linear taper types. Other guitars sometimes use Logarithmic (a.k.a audio taper).
To check which yours are before buying the wrong sort of replacement, lift out the pot(s), disconnect the wires and measure the outer two lugs with an ohmeter. If the reading is approx 300k and when you turn the pot half way - each half reads around 150K you have a linear. If one half reads around >250K and the other half reads about < 50K you have 'Log' types.
In an ideal world they would all be the 'correct' type of log taper (i.e. a slope ration of about 60:40) - but the newer CTS ones seem to have something nearer to a 80:20 slope ratio. This resulted (for me ) in an 80% increase in volume between 0-3 and the last 20% between 3 - 10 !
Tone controls stayed Log/audio taper.
Finally, check the shaft length. To reach the body surface of an arched top Les Paul body, you will need the 3/4" shaft. For a flat body (like an S.G.) you need the 3/8" shaft.
I do not mention these things to patronise you , I just want to save you from blowing cash on the wrong goods like I did the first time round in my impatience !
Regards.
Derek.
:D