As for the T1, I found an inexpensive small mixer (Mackie, Edirol, Yamaha, Peavey--I've used them all) offers more versatility than the T1 at a lot less money.
I dunno Don ... the T-1 has a great guitar tuner which I love, easy to see in the dark controls, fantastic effects and lots of combinations of them - none of the mixers you mentioned can compete with that. True, it's more money, but - protective case, cool mounting hardware, case cover, preset scenes ..... add it up.