please chime in...

i've replaced the pre section of my simaudio moon i-5 integrated with a tweaked bottlehead foreplay for cd only. i find tubes in my otherwise ss chain makes a difference. it smooths things out. normally i hate digital, and prefer listening to vinyl. but while the table is in the shop, i've been listening to a lot of cd's, and have been pretty satisfied at what the foreplay has brought to the mix. my question is: is this crazy?? using a $300 or so pre instead of the class a pre in a $2700 integrated and hearing a difference? is it possible? i know the common answer might be if it sounds good to you keep doing it, but im just trying to get opinion if this is logical, and if so, why don't more folks try it with their ss integrateds? and im wondering trading all of this in and using something like a pathos hybrid might make more sense...

really looking for feedback here. thanks.