I wouldnt buy an ion, they are pretty unreliable and say.. They have low resale value but if u do decide to go with an ion i say buy one used! they go for super cheap and with TONS of upgrades.. they arent that good.. but still what is ur budget..?? i say go ahead save up ur money and buy a different marker instead of upgradeing parts on ur spyder.. (not worth it) For example u can look into the new dangerous power g4 or even the g3... they come very well equiped stock and are SUPER reliable.. what games do u play? I play speedball.. any info like this can help on deciding which new gun to get..
-Edgar