The positioning of our preamps:
P-8 - excellent value for money top quality preamp for $1095. Any circuit board upgrade will be around 30% of MSRP. Minor upgrade usually cost $50 or less.
P-9 - expanded version of P-8 (XLR in/out, more in/out etc) but with different design and possibly with different volume control technology. World class preamp. It could be between $3000 to $5000.
P-10 - super high end and spare no expense in every details MSRP for $7000 to $10,000. Best preamp in the world (ok, at least top 3 ).