Imho stock barrels from Spyders are not bad. People who say that they suck do not know where is the problem. They need only be polished/honned and they need really big paint.
With common small-sitze paint, every good .689" barrel will be better than .692" stock Spyder barrels. There are not substantial differences in accuracy. I have 12" Smartparts Teardrop, 16" J&J Ceramic, old 12" Smartparts Ventury and some 9" and 10" .689" stock barrels from Spyder-thereated pumps (Hammer, Sterling Bronze). My Pal has 14" J&J Ceramic. They are are all comparable and they all shoot darts with round paint. Longer of them with porting are only quieter.