Used, the Sonic Frontiers are balanced and SFL2's have dual outputs in XLR. I think the Line2 and Line3 do too. Factor in replacing tubes with NOS.
One of the most versatile preamps is the PS Audio PCA2, which goes for around $700 on the 'gon listings.
The Threshold T2 also had dual XLR's
In the higher end, I can only think of the Pass X0.2 and Ayre K1 that have dual XLR but they're more than your budget.
One of the most versatile preamps is the PS Audio PCA2, which goes for around $700 on the 'gon listings.
The Threshold T2 also had dual XLR's
In the higher end, I can only think of the Pass X0.2 and Ayre K1 that have dual XLR but they're more than your budget.