Mapex PRO M is an excellent choice but it's not a low end maple set !!! In fact, PRO M shell are the same as ORION (confirmed by Jeff Ivester of Mapex usa). Like its small brother the M birch, they sell like hot bread...
You also look at the Gretsch Catalina Maple or even the new Lugwig Accent maple. Yamaha offer now their new affordable 100% maple shell TOUR Custom which was announce last winter.
Anyway, you cant go wrong with the MAPEX PRO M though, for the price it would be my kit of choice...
BTW - have you see the PDP FXR shell pack deal from musician friends ?
They aren't maple but I invite you to get confuse
http://www.musiciansfriend.com/produ...ack?sku=446831