Its mostly personal preference, i think the CM Scout looks better than the Antec. They are both pretty cramped cases if you asked me but im used to a Cooler Master HAF 932. You should throw in the Cooler Master HAF 922 in this competition, the HAF 922 has the best airflow when side panel fans are added. The Cooler Master Scout also gives really good airflow when you throw in the side panel fans. The Antec has pretty good airflow but it doesn't really match up to the Cooler Master, only because the side panel fan you can put on is really small, its 120mm. The HAF 922 and Scout can have like 2x120mm on the side i believe which will give really good cooling to the mobo and all that.
Read reviews on them, the Scout is also painted black inside which is a plus and its great quality. I personally like the Cooler Master cases over the Antec ones.
Either one will be fine though, as for filters.......either way, your gonna be cleaning out ur case periodically with them or without.