While I like JBL speakers in general and actually still have mine, I do not care for JBL subs.
Yes, I know he is talking about budget subs, but this is not to say that ALL JBL subs are not up to par.
Heck, 50~70% of theaters use the Cinema (Pro) subs from JBL.
(however these are in a completely different league)
At 220 pounds, it better kickbutt.
http://www.jblpro.com/pages/cinema/lfsub.htm
Anyhow, back on topic.
Yeah those Dayton do look to be good bang for buck.
I have had a few JBL subs, and they were quite musical and were well worth the price.
If you are spending for 2 budget subs, roughly 270.00 shipped
Why don't you just put that ~270 for a little better sub, like the BIC H100, or one of the STF HSU subs.
And then save up for a second one of those later?
But I will point out, as most people have already hinted at.
That you do get what you pay for, (usually) when it comes to subs.
That being said, I recall the JBL E250 was well worth the money, and was musical.
The H100 was not as musical, but was very good for Home Theater.
Then again, it has been a long time since I have heard them.
I to, am thinking of upgrading my sub, and will be selling my current one.
But sorry, it would be a little more than 270.
But if you are remotely interested, then by all means PM me. It is a HSU VTF3 MK2 (Piano Black).