Any small monitors that dont sound thin and bright

One of the really musical monitors on the market is the Sequerra Pyramid MET-7. I owned a pair for a number of years, and found them immensely satisfying. There have been several pairs of these monitors for sale recently here on A-gon, so you might want to check them out.

For more info about the Sequerra MET-7's, go to this link:
www.sequerra.com
When you get their home page, you will want to look under "Sequerra Audio" for the page on the MET-7's.

Reference 3A recently introduced a mini-version of the renowned de CAPOS. Retail us $1795.

Sequerra MET 7's. Meadowlark Vireo and Swift. Dynaudio Countur 1.1 and 1.3SE. ProAc 1Si or old 1 SC and Reference Signature 8. New product from Finland being introduced this year at CES -- Penaudio Charisma (penaudio.fi) probably blows them all away.

Give System Audio SA2K a listen they sound better than any other I have listened to. AE-1 , Swifts , Proacs , B&W 805s , I have not listened to the Totems. These are not thin and bright . But very expensive 3500.00 retail. Worth it IMHO.

This is just my listener's opinion, but Castles sound a little dark and closed in and Totems (Model 1 and Mites, I've listened to both) sound somewhat flat and uninteresting. I also have a small room (11 x 13.5 x 8) and use a REL Strata III subwoofer. I put off auditioning subs for years, wish I'd done it sooner. The little Spendors are, in my opinion, far more musical and involving than either speaker you mentioned, and will mate just fine with a REL.