The X2000 is almost identical to the 2113 except for a couple of network related features IIRC plus what Rupam said re: Zone 2
Now that the X2000 has become much more costly i think you should be fine if you get your hands on a 2113 or even a 1913 if you can do without Audyssey MultEQ XT, 4K video passthrough, a slight increase in rated power, what appears to be a better power supply, superior video processing, RS-232 control (if youre into that sort of thing), and second-zone preamp outs. Considering you are a newbie I think a 1913 should be ok. At the latest price the X2000 is just not worth it IMHO