I completely agree with Jonathan regards the spindle VS router but would also like to point out one other advantage the WC spindles have over router based machines and IMO it's significant esp for some work like V Carving and 3D work.? . . . DUTY CYCLE.
The cheap BQ £30-40 jobs have a duty cycle about the same has chocolate in sun shine.!! The better Kress routers claim about 8hrs Thou I very much doubt they will do too it many times before showing the affects.?
When cutting decorative type work, esp things like litho-pains and 3D carvings then the cutting times can easily run into 12+hours and far longer if large sizes.
The WC spindles can run 12hrs without batting an eye lid and it's not unusual for me to leave mine running none stop for 20+hrs.!!

I know we all want to keep costs down but some times your far better off waiting an extra few weeks or months to find the extra money. When the difference gets close like with the Kress VS WC spindles then it really does become worth the wait has they don't compare to each other. Like Dean says your CNC experience will be so much more pleasant and rewarding not to mention in the long run far cheaper.!!