That's actually a really good point I haven't thought of - the resale value of your custom chips.
Would be curious to know other "chippers" opinions on this, but it seems like when you're first starting out (and trying to keep costs down with your first set, even it's an expensive hobby), the Rounders set may be the best way to go. It allows you to have that clay / casino quality chip AND nostalgia from what could be the best poker movie of all time. From there, if you ever want to make another custom set, maybe you can sell the rounders set to help offset costs or just keep the rounders set and make another custom set.
Seems like the best advice given is to get your hands on some samples from CPC, whether it be direct or borrow from other people here, before you buy a set.