I realise I'm very late to the party,but I think one huge thing X2 has over others,or what makes it interesting to mention,is just the sheer amount of "tools" included" with the program[Producer of course].
I mean even with just the"Pro Ch. mods",and"Breverb"[stock inc.]I would have upgraded,but then you've ALSO got "Console Emu.","R-Mix",THD Amp Sim[which I'm not finding that different to others,but hey,maybe an "amp sim Epiphany" will strike tonight!!]and "time Line" "horizontal Zoom"[which I love],and "FX chains 2.0"
About the only things I dislike,are the "help chm",and the PDF Manual,for some reason,everytime you look for something,you've then got to go to a totally different section,rather than just explaining stuff,in one place[like Scott G's Book]-I'd have been"put away" without "X1 Power".
Cheers
Bob