I've done a lot of amarillo saisons. Definitely do both, you'll have great results. Especially if you use 3711 and ferment at around 75-78. That yeast becomes very citrusy in that range and will contribute to the citrus flavors and aromas from the amarillo. Just don't forget a blowoff, that yeast goes buck wild!!
Be careful using too much finishing hops with a saison yeast. I have used one that completely scrubbed all the hop flavor and aroma out during fermentation (dry hopping would have been the only option for hop flavor/aroma). This is TOTALLY strain dependent and you won't know until you try it. So like the other posters, I say go for it. Good luck!
I actually make a saison that tastes similar to tank 7. It uses cascade and saaz in the boil and a flameout addition of cascade, saaz, and a bit of mosaic.
Funny thing is I had made the beer just a bit before tank 7 came to Florida and everyone agreed that it was similar to my saison.
Im using wlp568 and have 1.5 oz of amarillo for flavoring (brewers gold for bittering). I might split the flavoring hops to add both dry hop and finishing hops! Thanks!