Well I just listened to Iris, but it's awesome man! That guitar sounds bloody awesome, it's clear you're using some decent recording techniques as well as decent equipment!

The vocals are awesome, you really got the feel of the song right. The only thing I'd say was that in the original there's more light and shade between the verses and the chorus, and as this is just an acoustic cover I think it could do with more of that to really bring out that big chorus!

All in all, that's a job very well done! C4C if you have the chance dude:
Fender 60th Anniversary Standard Strat,
Epiphone Les Paul ES,
Line6 Flextone III,
Laney VC15,
Some pedals,
Some recording gear.