Alternatives to WHCC for printing... Locked

My prices are generally considered low, which I'm proud of.  But recently I had an order for a 24x36" canvas print and actually would've ended up losing $2.00 on the deal had I not tried out Canvas4Life.com, which ended up doing a great job and giving me significantly more profit.  WHCC swears they didn't raise their prices.

Rather than raise my rates, I'm considering switching labs and wondered what labs other people might find to be a good value.

Thanks,

-proudfather

PS:  No desire to do my own printing.