Trades are the way to go for storage, and the extras that are included (Cover galleries and concept art for example) make them much more worthwhile.

However if we do not continue to support the issue releases then we wont get the trades.

So I get both for comics I like, the IDW comics in particular. However since you are not re-reading and referring to these comics over and over again, I'd say the trade is certainly the way to go.