Bass traps - too many choices!!


Browsed the forum and read a lot regarding bass traps. But overwhelming and still not sure what to buy. Looked at the ASC site; and their tube traps are tuned to different frequencies. eBay sells foam wedges which are advertised as corner bass traps. Relatively inexpensive too. But are they effective? I've also heard about using sand-filled cardboard tubes (used for pouring concrete). Even heard that a large potted plant set in the corner can be an effective bass trap.
Can anyone simplify this? I already have Room Tunes in my corners. Speakers are on the diagonal as my listening room is kinda squarish. So I'm just looking to put a bass trap in the corner behind and between the two speakers. But I want to make sure that whatever I buy is effective. 

rockyboy
I recently pulled my Rel Storm III out of my room (and put it up for sale). Found it added little to SQ and getting it out of system simplified my life. I will look into the REW and microphone to see their cost. Downside is that they are a one time use item. After setup, the items go on the shelf. Shame that dealers don't purchase and rent them to customers. 
That's a very interesting review, George. I wonder though why the trap needs to be priced at two grand.

It's an active trap, so it's got specialized room correction electronics inside, until they become mainstream (copied), they can charge that much.


Cheers George 

best bang for the buck i know of and use are GIK Soffit traps.  Effects are broad and effective below 100 Hz. Great advice available.

ASC is very good but pricey.

foam corner wedges, meh.