Whether the components are equivalent to 105 is kinda pointless. But yes, they are good quality parts in the middle of the spectrum. The Deore shifters are sorta like 105: durable and they work well, but slightly heavy and not quite as smooth as the higher-end models. The XT RD is more like Ultegra: excellent quality, price and design, but not as expensive or exotic as XTR (think Dura-Ace). The level goes something like this: Deore, LX (or SLX), XT, XTR.
The components you have are good value, and should work well. I really like the Recon fork too. Nice and light, and will handle your XC applications well.