Subwoofer for Beginner

I bought a REL Q150e on Ebay for 200 bucks about 3 years ago. It's an older model, but perfect except for missing the easily repaired/replaced grill (still had the frame). I consider it the among most fortuitous gear scores I've ever made since it KILLS, so to speak. Seriously...in my little system it is just an amazing sounding thing and all I do is turn it up or down a little here and there. All for the price of a very expensive sandwich or 100 rolls of nickels.

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.