Subwoofer advice


So looking to add a new component (or 2) to my system (Snell Type D, McCormack .5 or Jolida 502b, Schiit Saga pre, Rega Planet, Dual 1219 TT) and contemplating a sub.  Basement room is 14'w x 30'l x 7.5'h and treated with first reflection points and base traps on front wall.  Interested in the REL T series, either the T7i or T9i.  The Snells have 8" woofers so not sure the T7i at 8" will make a significant difference.  The room might be too big as well.  So it might have to be the T9i at 10".  Looking to supplement clean low end not anything bloated or overbearing.  

Any thoughts greatly appreciated!
pkatsuleas
Rel or Sumiko is a good choice!  The T9i is great!  I would also take a look at the Sumiko S10 at TMR for $750...

2 are definitely better than 1 so keep that in mind as well
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Hello pkatsuleas,

     I notice you seem to have 2 amp setups, a tube setup with a Jolida tube integrated amp and a solid-state separates setup with a ss Schiit preamp and a ss McCormak .5 amp.  
     All good stuff but I need a bit more info before I can offer meaningful advice:
1. Do you alternate use between both of these systems?

2. Are they used for music only or do you also use for some form of home theater audio?

3. What's your budget range minimum to maximum?

4. REL are nice subs but there are other high quality subs at more reasonable prices.  Are you willing to use other brands of subs?

5. Are your speakers set up along the long 30' wall or the shorter 14' wall?

Thanks,
  Tim