Well I have not decided anything yet between the upgrading option since I am seeking some advise from any who have experienced these two models and if you are a boulder fan which I am not, I just like their phono preamp (going 10 years now and it has not been superseeded) since I have tried most out there and the list is way too long.
PS: I am actually not a fan of the big bulky machined chassis as well since I would have easily sticked with my Klyne reference phono but what is actually inside the Boulder phono preamp is special :)