There's no deeper slip-ons on the market than CFRs and I'm not biased cause that's what everyone who listens to mine says.
Listen to a set of CFRs and you tell me.

 

I love my ThunderHeaders but as mentioned earlier...you have to hear them for yourself. What I like may be completely different from what you like.

That said - When I bought my bike it already had Screamin Eagles on it. It took me no time at all to look for deeper sounding exhaust. I listened to many including most listed in this thread. I chose TH hands down.

 

I had your exact setup when I too decided I wanted a little more. So I dumped the V&H Fuelpak and SE slipons for a PCV, Jackpot Dyno Tuned mufflers and a SE Heavy Breather. All I can tell you is that this is a great combination of parts without getting into the motor. Won't break the bank either. Call the guys at Fuel Moto should you decide. You won't be disappointed.

 

I like the sound of RINEHART slip-on @ my 96" Heritage. Top quality chrome & fit.

 

I like my Monster ovals seem just right.
Ron

 

Monster Ovals. Compared to stock, they are slightly louder and very deep.

 

I really like my MO's, but as others have stated, sound is subjective. It would be beneficial to hear firsthand, but take into consideration what modifications that bike has had. No 2 bikes are alike, so what sounds good on one, may not sound as good on another.

 

All the stage one does for you is increase the rev limiter to 6200 RPM and alters the timing, and adds a less restrictive HD SE air cleaner. Does nothing to the fuel management. The current SE pipes are all basically stock pipes with a bit more sound.

If you want more deep sound with better flow may want to look at the new "Jack Pot" pipes from Fuel Moto: www.jackpotmufflers.com they will give you the tone you are looking for without the "jack hammer" noise while cruising.

 

PYTHON PREDATORS, sound is throaty and deep.
Love them

 

I searched for baffles for quite a while. I had the SE Touring Slip ons- 4" diameter and interchangable tips. Cycle Shack makes a replacement baffle part number 1544. Available from Drag Specialties or from Dennis Kirk for about $55. The pair of baffles will need to be match drilled to the 3 holes in the existing cans.

Use a drill bit that is 0.190" (or larger, just watch the depth of drill) in diameter to drill the center of the existing 3 pop rivets. Drill slowly so you can just drill the center of the pop rivet head only. The rivets are stainless steel, so use some light oil to help lube the drill bit. Once the rivets are removed, simply slide the existing baffles out and then slide in the new ones. Once in place, use a sharpie or pencil to mark where to drill the new holes. Remove the baffle to drill on a table or workbench. I used a center punch to carefully punch the center so the drill bit wouldn't walk. Once the holes are drilled, re-install the baffle into the muffler can, slip in a rivet (supplied) and pop it with a pop rivet gun. CAUTION- Use safety glasses when popping the rivets. After installing the rivets, replace the end caps.

The Cycle Shack is a 2" baffle tube and is louder and more free flowing. definitely worth the money and time to change.

Good luck...