The Fender Super Champ XD will give you a lot more tonal options than split coils will, in my opinion.

I have a Super Champ XD and think it is a great amp. They have a new version out now called a Fender Super Champ X2. It has a USB connector to access the Fender Fuse site that the Fender Mustang amps use. The Super Champ XD is way nicer than the Mustang in my opinion, being in significant part a tube amp with a digital section in it. The SCXD models 16 amps, about 8 classic Fender amps, and around 8 other classic amps from Marshall up to ultra high gain amps. It is definitely a nice amp.

Not as nice as the Fender in many ways, I just bought a new old stock (NOS) Vox VT30 "Chromie". I really like this VT30 with the ten inch speaker and a power attenuator knob on the back that allows you to turn down the volume to around one watt or less. The object is to turn up the gain and volume and adjust the master volume on top of the amp so you get some awesome overdrive sounds - then you turn down the power attenuator knob on the back of the amp to a really low bedroom level that won't disturb anyone, and you still get that super saturated tube overdrive sound. It is really nice. You don't get that classic Fender clean that the SCXD has, but you get lots of nice effects and amp models that combine a lot of great tones into some awesome sounds, quite different from the Fender Super Champ XD.

I got my NOS, brand new, Vox VT30 "Chromie", after the chrome BBQ type speaker grill on the front, for 165 dollars, brand new, out the door. I've had it for about a month and a half and use it every day with all of my guitars and it works great. They are blowing out the VT30 amps for a fraction of the cost because they have a new series out now called the "plus" series, such as in the VT40+. I like the VT30 personally. It has a ten inch speaker and a dedicated reverb knob. The new series doesn't have a dedicated reverb knob; the reverb is just another effect like all the other effects. Plus some of the new "plus" series have a "snare drum" rattling sound that I wouldn't want to wind up with, not to mention that you will pay more for the "plus" series. Getting back to the VTxx series - the VT50 in specific is a "very" bassy, untamable amp. I tried one and there was nothing I could do to tame the bassiness, including turning the bass down all the way. I found it to be not acceptable. Some say that you can put a small pillow inside the amp near the speaker and it will take care of the problem, I'm not sure. The VT50 has a twelve inch speaker but the extreme bassiness made the amp useless to me.
If you look around you may well be able to find a VT30 for a great price, like 185, NOS. The older AD30VT amps have been around a lot longer and the VT30 amps and those in the VT series have addressed, supposedly, some of the concerns owners had with the older versions. For instance, with the VT30 amp the 12ax7 full sized preamp tube (normally a preamp tube in full tube amps or the SCXD) is in the VT30's "power amp section", not the preamp section. This is regarded as a major improvement in hybrid amp technology.

By the way, even though the VT30 can whisper beautifully, it can also roar quite loudly when cranked. I tried a VT15 but found the eight inch speaker to be a little small and it doesn't have the power or sound of the VT30. Since you already have an amp with a small speaker I would advise getting one with at least a ten inch speaker - such as the SCXD or the VT30. There are a lot of other amps, but I guarantee that either of these two amps will do your SG very well.

I think you are going to really like those pickups. They should be more powerful and free from any muddiness. You will be getting some pickups capable of some beautiful tone.