I personally like the Vypyr over the Spider. However, it only matters what
you like. Line 6 makes a solid product, with each line aimed at a different type of player. I think the Spider III series hits exactly what it aims at: entry level, metal and hard rock players, at an affordable price point. IMHO, there may be other amps that do the same job, some better, some worse, but it all comes down to
your preference.
Enjoy your new amp, and don't worry about what others think. Tweak every setting you can. You'll be occupied for a while

. Better yet, when it comes in, post a review of what you like / dislike about the amp. It'll give us a springboard for more discussion! Include clips and pics if you can.
Take youtube vids with a grain of salt. Some of the reviews may be just based on hype, or less than honest, with the purposeful intention of promoting one brand over another.