As some of you know from previous posts I received the base set of 72 markers as a gift in June and as of late having been doing most of my coloring with them exclusively. I like them quite a bit and because they are refillable I think it's most likely that as I run down my Prismacolor Markers (which are not refillable) I probably won't replace them as I've been doing. I may even save up some and add the additional four sets of markers Spectrum Noir offers to 'extend' the color range.
I know that many crafters swear by Copics. Many collect them just one or two at a time, and I'm not here to convince you otherwise but if you're on a tighter budget but would still like to explore coloring with markers I think the Spectrum Noir base collection would be something to consider. Mine were a gift to me but I've seen them at my JoAnn's (I'm pretty sure you can use coupons on them) and at many online retailers. At Simon Says Stamp the base set of 72 will set you back about $145. Not inexpensive by any means but within reach for many. The base set includes a nice selection of colors and as you can see in this card, plenty to color even a fairly complex image nicely.