As I said, use them purely as a DAC. Just to hear the sound quality. The other things are 'free' lol. I think the modded DEQ I have at the moment competes with anything below £5K. I can only guess at what the PSU upgrade will do. Only downside is it must be used with a passive transformer based preamp. But to me that's no downside, they are the best anyway 
I would hold a bake-off myself when I do the other mods but my room is only big enough for two people!