If you're worried about your tone in respects to tuners, split ur signal, one ine tuner and one into pedal board. I do it with an ernie ball volume pedal, which is good so i can still tune silently. Otherwise, the Boss Tu-2 is great, the Korg DT-10 is very very good.
Delay wise, i personally use a TC electronics Vintage delay, which is superb. Very clear and very nice. if u are only goin to be using it in the fx loop why cant u change the delay sound? are u not having the delay near to u or something? its just that tap tempo is a great feature to have. Of course the boss delays are fantastic, so you'll have to test everything out as much as possible.
I also use a Voodoo lab pedal power 2, great power supply with 8 outputs, i use all but 1 and have 2 etc power supplies for my whammy and delay (coz the cant be used with the PP2).
I hope ive been some help
Joe