Subwoofer for Beginner

FWIW...I bought an older Paradigm PW 2200 sub for a song...these were close to 800-1k awhile back...incredibly clean and punchy...much better than their lower end PDR series...

Just a word of caution ... subs are speakers too! Don't cheap out too much. Matching a $200 fart thumper with your $5,000 main speakers might just work out fine, but if not, I'd blame the pedigree or implementation more than the concept. (For all of those who spent $200 or less on their subs which work wonderfully for them, please do not take offense. Not all $200 subs are made the same. I am not inferring about any specific sub mentioned in this thread.)
If not confident in your purchase, buy used so you can re-sell at little/no loss if you do not like.

I'm with Wolf and love REL subs. Find. b2 for under $1200 and experience what a sub can do for you. You'll be able to sell it for what you paid for it.

I have a Martin Logan Dynamo 700 that packs a pretty solid punch for its size and it wasn't too hard on the pocketbook. REL has some small footprint subwoofers that are generally well received.

Okay, so now I understand better why sometimes you need a sub. If you' e landed a pair of speakers that have incredible mids and highs which you are not willing to give up, but no deep bass, well....here we are.

Keep us posted about which sub you go with!