system upgrade

….LSA Sig20 speakers.I would like to upgrade my speakers. 

Normally, an easy upgrade path might be sticking with same brand and moving up their models as brand Sonics (house sound) are often consistent. But changing brands the Sonics character will change.  

Generally speaking, because speakers sound different it best to demo yourself to find Sonics that subjectively resonants with you.  Usually high-end audio stores and audio shows.

That said, I like these <5k Audiogon listings:

• Tekton Design Moab
• Qualio Audio IQ 
• Diptyque Audio DP 107
• Revel Performa F226Be

Those Qualios would be an awesome buy at 5k.

I wound up buying a new pair of Revel F228Be's. I paid 6k. Does anyone have experience with these ? If so,are they better when biwired?

Bi-amping is good. Bi-wiring does nothing IMHO. 

Revival Atalante 3 $3,400 with stands or Revival 5 $5,100, Buchardt Audio E50 $4,500, Arendal 1528 Bookshelf 8 Bookshelf $4,500, Fritz Audio Carbon 7s $2,950 or Rev 7s $3,800, Alta Audio Alyssa $5,000, Monitor Audio Gold 200 $4,800, Dynaudio Focus 30 on sale $5,900, Perlisten R5t $4,300, Sonus Faber Sonetto III G2 $4,400, MoFi Sourcepoint 888 $5,000, ProAc DB1 $4,600 or D2 $5,000