tight sound and tight $ sub for Silverline monitor


I'm looking for a "cheap" musical sub - if that's not a contradiction in terms. It doesn't have to go super low or super loud - just locking for something tight and tunefull to go with some Silverlines in a bedroom. I'm looking for something to add a little impact and flesh out the bottom end a bit.

There are some relativly inexpensive models from Energy and M&K - are there better alternatives? Thanks.
angaria
Thanks for the suggestions guys - hadn't noticed either of these. I'm also looking at the 10" x-sub from av123. Anyone heard it?
yes,made by onix ,xery well made and works weel if used near a corner good clean tight bass!!!
Bass "tightness" is often a product of the room response.
For example, large response peaks due to room gain will exhibit overhang and ringing, even if the response is measurably close to being "flat".
Room treatments, bass traps etc... are surprisingly effective. You may find that you don't need a subwoofer for clean tight bass above 40hz.
I agree with HifiDreams. RELs top shelf subs are considered and ARE the best in the world!!
That is ALL they do--design & build subwoofers.
Even their inexpensive subs are VERY good, for the
$money$ you won't beat it.
Good luck in your search!