How do SVS subwoofers compare to REL?


I'm looking for subwoofers (one or two) that have a very "tight" natural sound and are not overly boomy. In the future I hope to pair them with some Magnepan speakers. Magnepans are known for having a natural sound, and I want to compliment that.

I've been told that the REL subwoofers (e.g.,T/9i or S/3 SHO, etc., are a good match for Magnepan speakers. However, SVS subwoofers have also been recommended to me.

I don't have any background in high-end audio, so I am interested in opinions of folks here. Are SVS subwoofers considered generally as good as REL in regard to the features I'm interested in? Is either clearly superior? (I had never heard of SVS before yesterday.)

Which subwoofer size (in REL or SVS) would be a good match for a pair of Magnepan 1.7i in an 18 foot x 15 foot room (ceiling about 10 feet) with carpet on floor?

I'm looking at these so far:

REL T/9i Subwoofer about $1300
REL Acoustics S/3 SHO Subwoofer (Super High Output) about $2100
SVS SB-4000 13.5" 1200W about $1600
Any other recommendations?

Total subwoofer budget is around $2600 max. ($2000 or less would be better.)

Also, I believe it is better to buy two smaller subwoofers, compared to one larger one, right? (I'm just not sure where I would put two. Placing one is easier in this room. And I plan to connect everything with speaker wires, not wireless.)

Thanks

lowoverdrive
On the subject of subwoofers for Maggies, has anyone compared Magnapans own DWM bass panel to those excellent subwoofers made by other companies?
Here's a subwoofer I haven't seen mentioned in this thread:

B&W DB3D SUBWOOFER
DB Series Dual 8" Powered Subwoofer

Any thoughts on it?
@bunnkmpharmd

On the subject of subwoofers for Maggies, has anyone compared Magnapans own DWM bass panel to those excellent subwoofers made by other companies?

Even my Magnepan dealer did not recommend the DWM bass panel because (if I understood correctly) it is designed for the smaller Magnepan speakers which do not have a bass section. I was told that it would not add anything to the 3.7i series. I guess it might not add anything to the 1.7i either. For those, you want something more like the options discussed above in this thread. That's my understanding anyway. Correct me if I'm wrong.
Is the DSPeaker Anti-Mode 8033 recommended with the higher-end SVS subwoofers which have their own DSP?
Review of the Sumiko S.9

https://hometheaterreview.com/sumiko-s9-subwoofer-reviewed/?page=2

When you consider the actual improvement it can deliver to an audiophile two-channel system (especially one employing small to mid-sized tower speakers or large bookshelf speakers), how little effort it will take on the listener’s part to gain that improvement, and that it won’t detract from the sound quality of the main system, it’s probably one of the best buys a subwoofer-less audiophile could make...

and, Sumiko compared to REL:
my experience leads me to suspect that few, if any, unbiased listeners would express a clear preference for one of these subs over the other.