Since my Ibanez is routed reverse P does this set still work? Sorry if this is a dumb question!
Thanks so much for the rec on EMG's I feel pretty good about going this route.
A reverse P doesn't need a special pickup. Any P pickup can be reversed with no ill effects. Many will argue that a reverse P is actually a better format for a P pickup anyway and I'm not sure they're wrong.
You asked earlier in the thread about EMG vs. Nordstrand, which is a little hard to answer because both companies offer a wide range of products, but just about all companies have a general tonal ideal that they are known for and then some of them offer products that step outside of that ideal to please other customers.
EMG - and I'm talking about the classic EMG sound that they became known for in the 1980s - is known for very even, full-range sound. Their pickups don't tend to favor any particular frequency range. They were among the first companies to offer "hi-fi" sound in a bass pickup. At the time, many bassists felt that sound was too sterile sounding (myself included) but a lot of the problem was just the other equipment in the signal chain during that era. '80s-era EMG pickups sound great through modern gear. They also make VERY well-balanced P/J sets.
Nowadays they offer a lot of other tonal flavors (as well as versatile preamps that can change the character of their pickups) but their signature sound is even and full-range. Other companies that strive for a similar tonal goal are Delano (maybe even a little more modern sounding than EMG) and MEC.
Nordstrand tends to favor vintage sounds that feature a little more clarity and a little more bass. Another poster's description of "modern vintage" is a pretty good description, I think. Aguilar falls into this category as well, with maybe a little more grit. Their preamps sit in the same sort of sonic territory.
Bartolini is a favorite of mine; very clear lows, a push in the low midrange and very smooth but clear upper mids and treble. This is the tonal signature they're famous for and it's represented by their 'Original' line of pickups. Most people consider it to be a warm sound. Their 'Classic' line has more upper mids and treble but is otherwise similar. Their preamps are very neutral and versatile and work well with any pickups.
Lindy Fralin sticks to very vintage designs and tones and he does it very, very well.
Wilde was only mentioned a couple of times so far but they're worth looking into. Bill Lawrence designed the P-46 and J-45 pickups to be very even in response - passive pickups that are going for a similar tonal profile as EMG but with a little bit of vintagey stuff thrown in. Bill is deceased and the pickups are now wound by his widow, and at a very reasonable price. The P/J set is better balanced than most. It's an excellent, versatile pickup set.
DiMarzio is best known for their high-gain pickups from the 1970s and '80s that were hugely popular among hard rock players. They do a ton more now, offering a very diverse product line. Seymore Duncan also offers a huge array of products.
As far as preamps go, there are so many and many, to be completely honest, are very comparable. Any good quality unit with fixed frequencies from any of the big names; Bartolini, Nordstrand, Noll, Delano, John East, Audere, MEC, EMG, etc... are going to be just that: good quality units with fixed frequencies that sound good and are reliable. Pick the frequencies you like and off you go. Nobody's going to know who's preamp you have in there but you. Preamps with sweepable frequencies can be very handy (and a little harder to shop for) but, in the end, it's a tone control like any other and you just need to select the features that appeal to you - all the big names are going to perform well. That's why they got big.
Enough blabbing from me... good luck in your search.