If the choice is limited to the Dayton or the Polk only, go for the Dayton. If you can spring more for the budget, there might be other options.
Are you skilled with a saw, or maybe friends with someone who is? If you'd like something cool in a small footprint, you could build a DIY Sonosub pretty inexpensively. Shopping list:
What is that, like 140 bucks or so? Then just find a cheap amp or old receiver on Craigslist to power it, and maybe carpet or paint it, or spray paint skulls on it or something. It'll reach 100dB at less than 75W (plenty to fill a small bedroom I think), it'll handle 200W, it'll have a true F3 of 22Hz (uncommon for a properly-tuned 8" sub), and it stands in only a foot of floor space x 4' high (give or take an inch or two). With room gain, it should reach into subsonics (which the Dayton and Polk subs definitely will not do).
Basically, build this:
... and end up with this (simulated 100W @1m anechoic):