There is plenty of support for the Moreplay as a very worthwhile Pre'.
I have only used Build Your Own Pre's, my latest one being produced to a design that is not the standard seen on offer.
The Moreplay has been compared to my choice for a 'Build Your Own' Pre-Amp in its standard build guise and the assessor has preferred the Moreplay.
A version of a upgrade build guise, my choice for a Pre-Amp has been compared to Pre's up to £5K, with the outcome it has not been seen to be outperformed.
There are upgrades for the Moreplay that can be considered, along with these, I would heartily recommend the Internal Signal Path Wire is exchanged for PC Triple C and the Chassis Mounted RCA connectors are a Low Eddy - Pure Copper design. I can't see the additional costs for the upgrade and my suggestion extending beyond $300
There is great value to be attained when selecting certain 'Build Your Own' Pre-Amp designs, the search can prove to be very long to discover a alternative and if a Branded Item, might require multiple $0000's to have it used in a system.