My all time favorite fibers for spinning are Blue Faced Leicester and Falkland Wool. The Blue Faced Leicester is probably a little more suitable for beginning spinning. Also, colonial wool, especially the blended color rovings, are nice. I order most of my stuff from Copper Moose.
Knitter's Geek Code
KER+++$ Exp+ SPM++ Rosewood LM++ EbonySusannes++@ !Addi--
Yarn Natural Fibers+++ !Acrylic Stash+Scale+ Fin- Ent+ Flat+ Circ + DPN + ML + KIP+
Blog+ FO+++ WIP+++ Gauge F+++ Alt SP++++++++++